United States v. Samaniego, 187 F.3d 1222 (10th Cir. 1999). · Go Syfert
United States v. Samaniego, 187 F.3d 1222 (10th Cir. 1999). Cases Citing This Book View Copy Cite
159 citation events (154 in the last 25 years) across 19 distinct courts.
Strongest positive: United States v. Blechman (ca10, 2011-09-14)
Treatment trajectory · 1999 → 2026 · click a year to view as-of
1999 2012 2026
Top citers, strongest first. 50 distinct citers. How cited ↗
discussed Cited as authority (verbatim quote) United States v. Blechman (2×) also: Cited "see"
10th Cir. · 2011 · signal: see · quote attribution · 1 verbatim quote · confidence high
the obligation of establishing the applicability of a hearsay exception for these records falls upon the government as the proponent of the evidence.
discussed Cited as authority (verbatim quote) United States v. Blechman
10th Cir. · 2011 · signal: see · quote attribution · 1 verbatim quote · confidence high
the obligation of establishing the applieability of a hearsay exception for these records falls upon the government as the proponent of the evidence.
discussed Cited as authority (rule) United States v. Smith
10th Cir. · 2026 · confidence medium
Id. at 235 . 3 Appellate Case: 24-7081 Document: 65 Date Filed: 03/09/2026 Page: 4 the circumstances.” United States v. Chavez, 976 F.3d 1178, 1193 (10th Cir. 2020) (quoting United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir. 1999)).
examined Cited as authority (rule) United States v. McFadden (5×) also: Cited "see, e.g."
10th Cir. · 2024 · confidence medium
When the government waives harmless error, “this court may in its discretion ‘initiate harmless error review in an appropriate case.’” United States v. Samaniego, 187 F.3d 1222, 1224 (10th Cir. 1999) (quoting United States v. Torrez-Ortega, 184 F.3d 1128, 1136 (10th Cir. 1999)).
discussed Cited as authority (rule) United States v. Wood
10th Cir. · 2024 · confidence medium
In any event, even if this court were to disregard the government’s wholesale waiver of the required analysis and undertake the required Kotteakos inquiry sua sponte, see United States v. Samaniego, 187 F.3d 1222, 1224-26 (10th Cir. 1999), we would still conclude the admission of the Indian Blood Certificate was not harmless.
cited Cited as authority (rule) Kovan v. Kim
D. Colo. · 2024 · confidence medium
Id. (citing United States v. Samaniego, 187 F.3d 1222, 1224 (10th Cir. 1999).
discussed Cited as authority (rule) Jenkins v. CACI Inc - Federal
W.D. Okla. · 2023 · confidence medium
“A contrary result would inappropriately provide litigants with a means of avoiding rules governing the admission of evidence such as hearsay.” United States v. Samaniego, 187 F.3d 1222, 1224 (10th Cir. 1999).
examined Cited as authority (rule) Pitman v. United States Citizenship and Immigration Services (USCIS) (3×) also: Cited "see"
D. Utah · 2022 · confidence medium
See, e.g., WildEarth Guardians v. United States Bureau of Land Mgmt., 870 F.3d 1222, 1239 (10th Cir. 2017) (holding that the BLM had forfeited any harmless error claim, in a case brought under the APA, by failing to argue it before the district court) (citation omitted); United States v. Samaniego, 187 F.3d 1222, 1225 (10th Cir. 1999) (the government’s “silence on the issue of harmlessness and the failure to provide an adequate record to review suggests acquiescence in reversal”).
cited Cited as authority (rule) Hafen v. Howell
D. Utah · 2022 · confidence medium
United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir. 1999).
discussed Cited as authority (rule) Stroup v. United Airlines
10th Cir. · 2022 · confidence medium
“Because evidentiary rulings are within the sound discretion of the district court, [we] will reverse only upon a ‘definite and firm conviction that the lower court made a clear error of judgment or exceeded the bounds of permissible choice in the circumstances.’” United States v. Chavez, 976 F.3d 1178, 1193 (10th Cir. 2020) (quoting United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir. 1999)). 41 Appellate Case: 19-1373 Document: 010110650254 Date Filed: 02/28/2022 Page: 42 Our inquiry “does not end” with whether a district court abused its discretion, however.
discussed Cited as authority (rule) Lunnon v. United States
D.N.M. · 2021 · confidence medium
U.S. v. Samaniego, 187 F.3d 1222, 1223 (10th Cir. 1999) (citing Harris Mkt.
discussed Cited as authority (rule) Murray v. Manorcare of Topeka KS, LLC
D. Kan. · 2021 · confidence medium
U.S. v. Samaniego, 187 F.3d 1222, 1223 (10th Cir. 1999) (citing Harris Mkt.
discussed Cited as authority (rule) Lunnon v. United States
D.N.M. · 2020 · confidence medium
U.S. v. Samaniego, 187 F.3d 1222, 1223 (10th Cir. 1999) (citing Harris Mkt.
discussed Cited as authority (rule) United States v. Chavez
10th Cir. · 2020 · confidence medium
“Because evidentiary rulings are within the sound discretion of the district court, this court will reverse only upon a 28 ‘definite and firm conviction that the lower court made a clear error of judgment or exceeded the bounds of permissible choice in the circumstances.’” United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir. 1999) (quoting Gilbert v. Cosco, Inc., 989 F.2d 399, 402 (10th Cir. 1993)).
discussed Cited as authority (rule) United States v. Silver
2d Cir. · 2020 · confidence medium
See, e.g., United States v. Giovannetti, 928 F.2d 225, 227 (7th Cir. 1991) (“[W]e have discretion to overlook a failure to argue harmlessness, and in deciding whether to exercise that discretion the controlling considerations are the length and complexity of the record, whether the harmlessness of the error or errors found is certain or debatable, and whether a reversal will result in protracted, costly, and ultimately futile proceedings in the district court.”); United States v. Samaniego, 187 F.3d 1222, 1224 (10th Cir. 1999) 8 (“Although the government makes no assertion whatsoever tha…
discussed Cited as authority (rule) United States v. Tena-Arana
10th Cir. · 2018 · confidence medium
In deciding whether to use our discretion to address harmlessness, we consider three factors: 1. “‘the length and complexity of the record,’” 2. “‘whether the harmlessness of the errors is certain or debatable,’” and 3. “‘whether a reversal would result in protracted, costly, and futile proceedings in the district court.’” Id. at 1308 (quoting United States v. Samaniego, 187 F.3d 1222, 1225 (10th Cir. 1999)).
examined Cited as authority (rule) United States v. Little (4×) also: Cited "see, e.g."
10th Cir. · 2016 · confidence medium
I answer that question in the negative — viz., it is not appropriate. “[T]his court may in its discretion ‘initiate harmless error review in an appropriate case.’ ” United States v. Samaniego, 187 F.3d 1222, 1224 (10th Cir. 1999) (emphasis added) (quoting United States v. Torrez-Ortega, 184 F.3d 1128, 1136 (10th Cir. 1999)); see also United States v. Vanderwerff, 788 F.3d 1266, 1279 (10th Cir. 2015) (noting that “we have on occasion engaged in harmless-error analysis — either at the request of a party or, ‘in an appropriate case,’ sua sponte” (quoting Samaniego, 187 F.3d at…
discussed Cited as authority (rule) United States v. Vanderwerff (2×)
10th Cir. · 2015 · confidence medium
United States v. Samaniego, 187 F.3d 1222, 1224 (10th Cir.1999) (quoting United States v. Torrez-Ortega, 184 F.3d 1128, 1136 (10th Cir.1999)) (internal quotation marks omitted).
discussed Cited as authority (rule) United States v. Hill
10th Cir. · 2015 · confidence medium
Under Rule 1006, witnesses “may use a summary, chart, or calculation to prove the content of voluminous writings, recordings, or photographs.... ” See also, e.g., United States v. Samaniego, 187 F.3d 1222, 1223-24 (10th Cir.1999) (requiring admissibility under Fed.R.Evid. 803(6) of telephone records before admitting summary charts of the records under Fed.
discussed Cited as authority (rule) Ohio Receivables, L.L.C. v. Williams
Ohio Ct. App. · 2013 · confidence medium
A contrary rule “would inappropriately provide litigants with a means of avoiding rules governing the admission of evidence such as hearsay.” United States v. Irvin, 682 F.3d 1254, 1262 (10th Cir. 2012), citing United States v. Samaniego, 187 F.3d 1222, 1224 (10th Cir. 1999). [Cite as Ohio Receivables, L.L.C. v. Williams, 2013-Ohio-960 .] {¶ 21} We recognize that some courts have established a different rule for “adoptive business records,” where records created by a third party, such as a predecessor in interest, have been incorporated into the business records of the assignee.
cited Cited as authority (rule) United States v. Irvin
10th Cir. · 2012 · confidence medium
United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir. 1999).
cited Cited as authority (rule) United States v. Irvin
10th Cir. · 2012 · confidence medium
United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir.1999).
cited Cited as authority (rule) Iowa Pacific Holdings, LLC v. National Railroad Passenger Corp.
D. Colo. · 2012 · confidence medium
Trans-Rim Enterprises, 1995 WL 231381 at *3 ; United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir.1999).
cited Cited as authority (rule) United States v. Irvin
10th Cir. · 2011 · confidence medium
United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir.1999).
discussed Cited as authority (rule) United States v. Keck
10th Cir. · 2011 · confidence medium
Nor do these actions render the spreadsheets inadmissible as evidence. *797 If the records custodian had created a compilation by copying data from several spreadsheets into a new document, then that compilation would be admissible as a summary under Rule 1006 of the Federal Rules of Evidence. 1 While a summary is admissible only if all the records from which it is drawn are otherwise admissible, see State Office Sys., Inc. v. Olivetti Corp. of Am., 762 F.2d 843, 845 (10th Cir.1985); United States v. Samaniego, 187 F.3d 1222, 1223-24 (10th Cir.1999), Keck’s counsel conceded at oral argument …
cited Cited as authority (rule) United States v. Yeley-Davis
10th Cir. · 2011 · confidence medium
“The proponent of the document must ... lay this foundation for its admission.” Id. (citing United States v. Samaniego, 187 F.3d 1222, 1224 (10th Cir.1999)).
discussed Cited as authority (rule) United States v. Sanchez-Gallegos (2×)
10th Cir. · 2011 · confidence medium
“In deciding whether to exercise its discretion to address harmlessness, this court considers ‘(1) the length and complexity of the record; (2) whether the harmlessness of the errors is certain or debatable; and (3)- whether a reversal would result in protracted, costly, and futile proceedings in the district court.’ ” Id. at 1308 (quoting United States v. Samaniego, 187 F.3d 1222, 1225 (10th Cir.1999)). 3 Considering harmless error sua sponte is appropriate in this case.
examined Cited as authority (rule) United States v. Doe (6×) also: Cited "see"
10th Cir. · 2009 · confidence medium
Based on our decision in United States v. Holly, 488 F.3d 1298 (10th Cir.2007), we should not reach out to decide whether the error was harmless. "[W]here the government has failed to assert harmless error, this court `may in its discretion initiate harmless error review in an appropriate case.'" Id. at 1307-08 (quoting United States v. Samaniego, 187 F.3d 1222, 1224 (10th Cir.1999)).
discussed Cited as authority (rule) United States v. Phillips (2×) also: Cited "see"
10th Cir. · 2008 · confidence medium
United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir.1999). 1.
discussed Cited as authority (rule) United States v. Thompson
10th Cir. · 2008 · confidence medium
“The admission of summaries under Rule 1006 is within the sound discretion of the trial court,” Harris Mkk Research v. Marshall Mktg. & Commc’ns, Inc., 948 F.2d 1518, 1525 (10th Cir.1991), and we review a district court’s decision to admit summary charts under Rule 1006 for an abuse of discretion, United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir.1999).
cited Cited as authority (rule) United States v. Ary
10th Cir. · 2008 · confidence medium
United States v. Samaniego, 187 F.3d 1222, 1224 (10th Cir.1999).
examined Cited as authority (rule) United States v. Holly (4×) also: Cited "see"
10th Cir. · 2007 · confidence medium
Nevertheless, where the government has failed to assert harmless error, this court “may in its discretion initiate harmless error review in an appropriate case.” United States v. Samaniego, 187 F.3d 1222, 1224 (10th Cir. 1999) (quotation omitted).
examined Cited as authority (rule) United States v. Melvin Ellis Holly (7×) also: Cited "see"
10th Cir. · 2007 · confidence medium
Nevertheless, where the government has failed to assert harmless error, this court "may in its discretion initiate harmless error review in an appropriate case." United States v. Samaniego, 187 F.3d 1222, 1224 (10th Cir.1999) (quotation omitted).
cited Cited as authority (rule) United States v. Sells (Shelby)
10th Cir. · 2007 · confidence medium
United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir. 1999).
cited Cited as authority (rule) United States v. Shelby Wayne Sells Anthony Wayne Sells
10th Cir. · 2007 · confidence medium
United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir.1999).
discussed Cited as authority (rule) United States v. Schuler
10th Cir. · 2006 · confidence medium
Federal Rule of Evidence 1006 allows the use of summaries when “[t]he contents of voluminous writings, recordings, or photographs . . . cannot conveniently be examined in court . . . .” W e have further observed that while “[t]he materials upon which the summary is based need not themselves be admitted into evidence[,] . . . [a]dmission of summaries, however, is conditioned on the requirement that the evidence upon which they are based, if not admitted, must be admissible.” United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir. 1999) (citation omitted).
discussed Cited as authority (rule) United States v. Valerie L. Schuler
10th Cir. · 2006 · confidence medium
Federal Rule of Evidence 1006 allows the use of summaries when “[t]he contents of voluminous writings, recordings, or photographs ... cannot conveniently be examined in court....” We have further observed that while “[t]he materials upon which the summary is based need not themselves be admitted into evidence[,] ... [a]dmission of summaries, however, is conditioned on the requirement that the evidence upon which they are based, if not admitted, must be admissible.” United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir.1999) (citation omitted).
discussed Cited as authority (rule) United States v. Wittig
D. Kan. · 2006 · confidence medium
See Fed.R.Evid. 1006; United States v. Sa-maniego, 187 F.3d 1222, 1223 (10th Cir.1999) ("The materials upon which the summary is based need not themselves be admitted into evidence ... [but] must be admissible.”). 87 .
discussed Cited as authority (rule) United States v. Conner
10th Cir. · 2005 · confidence medium
We review a district court’s decision to admit evidence for abuse of discretion, U.S. v. Samaniego, 187 F.3d 1222, 1223 (10th Cir.1999), and we can affirm if the evidence was admissible regardless of the reasoning given by the district court.
cited Cited as authority (rule) United States v. Schuler
D. Wyo. · 2005 · confidence medium
The summary exhibit also meets the requirements of United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir.1999).
cited Cited as authority (rule) United States v. Matousek
10th Cir. · 2005 · confidence medium
United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir.1999).
discussed Cited as authority (rule) Mollett v. Mullin (2×)
10th Cir. · 2003 · confidence medium
However, "`we may exercise our discretion to initiate harmless error review in an appropriate case.'" United States v. Samaniego, 187 F.3d 1222, 1224 (10th Cir. 1999) (quoting United States v. Torrez-Ortega, 184 F.3d 1128, 1136 (10th Cir. 1999)) (emphasis supplied).
cited Cited as authority (rule) United States v. Pham
10th Cir. · 2003 · confidence medium
United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir.1999).
cited Cited as authority (rule) United States v. Payne
10th Cir. · 2003 · confidence medium
United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir.1999).
cited Cited as authority (rule) Weibler v. Universal Technologies, Inc.
10th Cir. · 2002 · confidence medium
United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir.1999).
discussed Cited as authority (rule) Echo Acceptance Corp. v. Household Retail Services, Inc. (2×) also: Cited "see, e.g."
10th Cir. · 2001 · confidence medium
Rule 803(6) “requires that the custodian or other qualified witness testify that (1) the records were made contemporaneously with the events and ‘kept in the course of a regularly conducted business activity,’ and (2) ‘it was the regular practice of that business activity to make the [record].’ ” United States v. Samaniego, 187 F.3d 1222, 1224 (10th Cir.1999) (quoting Fed.R.Evid. 803(6)) (footnote omitted).
discussed Cited as authority (rule) United States v. MICHELLE CHERRY
10th Cir. · 2000 · confidence medium
A district court abuses its discretion if its decision is based upon an error of law." United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir. 1999) (internal quotations and citations omitted). 7 A. Rule 804(b)(6) and the Waiver by Misconduct Doctrine 8 The Confrontation Clause of the Sixth Amendment protects a criminal defendant's "fundamental right" to confront the witnesses against him or her, including the right to cross-examine such witnesses.
cited Cited as authority (rule) United States v. Cherry
10th Cir. · 2000 · confidence medium
A district court abuses its discretion if its decision is based upon an error of law.” United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir.1999) (internal quotations and citations omitted).
discussed Cited as authority (rule) United States v. Cherry
10th Cir. · 2000 · confidence medium
A district court abuses its discretion if its decision is based upon an error of law." United States v. Samaniego, 187 F.3d 1222, 1223 (10th Cir. 1999) (internal quotations and citations omitted). 7 A. Rule 804(b)(6) and the Waiver by Misconduct Doctrine 8 The Confrontation Clause of the Sixth Amendment protects a criminal defendant's "fundamental right" to confront the witnesses against him or her, including the right to cross-examine such witnesses.
discussed Cited as authority (rule) United States v. Sifuentes
10th Cir. · 1999 · confidence medium
While this court unanimously agreed that the district court improperly admitted the telephone record summaries as to Mr. Samaniego, see United States v. Samaniego, 187 F.3d 1222, 1224, 1226 (Tacha, J., dissenting) (10th Cir. 1999), we do not think this error prejudiced Defendant for two reasons.
Retrieving the full opinion text from the archive…
UNITED STATES of America, Plaintiff-Appellee,
v.
Rolando SAMANIEGO, Defendant-Appellant
98-6152.
Court of Appeals for the Tenth Circuit.
Aug 18, 1999.
187 F.3d 1222
1999 U.S. App. LEXIS 20969
1999 WL 639146
Patrick M. Ryan, United States Attorney, Oklahoma City, Oklahoma, and Leslie M. Maye, Assistant U.S. Attorney, Oklahoma City, Oklahoma, for Plaintiff-Appel-lee., Michael G. Katz, Federal Public Defender, Denver, Colorado, and Jenine Jensen, Assistant Public Defender, Denver, Colorado, for Defendant-Appellant.
Tacha, McKay, Murphy.
Cited by 82 opinions  |  Published
Reporter's Syllabus editorial summary, not part of the Court's opinion

Appeal from the United States District Court for the W. District of Oklahoma. D.C. No. CR-97-152-CPatrick M. Ryan, United States Attorney, Oklahoma City, Oklahoma, and Leslie M. Maye, Assistant U.S. Attorney, Oklahoma City, Oklahoma, for Plaintiff-Appellee.

Michael G. Katz, Federal Public Defender, Denver, Colorado, and Jenine Jensen, Assistant Public Defender, Denver, Colorado, for Defendant-Appellant.

Before TACHA, McKAY, and MURPHY, Circuit Judges.

MURPHY, Circuit Judge.

Lead Opinion

MURPHY, Circuit Judge.

Rolando Samaniego was convicted in the United States District Court for the Western District of Oklahoma of 31 drug-related counts. His appeal is primarily addressed to the district court’s admission of several summaries under Federal Rule of Evidence 1006 over his objection that the underlying documents constituted hearsay and the government failed to lay the foundation required for their admission. This court exercises jurisdiction pursuant to 28 U.S.C. § 1291 and REVERSES.

A district judge’s decision to admit evidence is reviewed for an abuse of discretion. See Harris Mkt. Research v. Marshall Mktg. & Communications, Inc., 948 F.2d 1518, 1525 (10th Cir.1991). Because evidentiary rulings are within the sound discretion of the district court, this court will reverse only upon a “definite and firm conviction that the lower court made a clear error of judgment or exceeded the bounds of permissible choice in the circumstances.” Gilbert v. Cosco, Inc., 989 F.2d 399, 402 (10th Cir.1993) (quotation omitted). A district court abuses its discretion if its decision is based upon an error of law. See United States v. Lin Lyn Trading, Ltd., 149 F.3d 1112, 1116 (10th Cir.1998).

At trial, FBI agent Mark Seyler testified at length about his investigation of the drug-trafficking ring in which Samaniego was implicated. A significant part of Agent Seyler’s testimony focused upon summaries he made of subpoenaed telephone records. None of the underlying telephone records were admitted into evidence. The summaries, however, were received as government exhibits 900 through 906 over the objections of defense counsel. Defense counsel objected to their use for several reasons, including the inadmissibility of the underlying documents as hearsay.

Rule 1006 states ■ that summaries are permissible when voluminous evidence “cannot conveniently be examined in court,” and when the evidence upon which the summary is based is made available to the other parties at a “reasonable time and place.” Fed.R.Evid. 1006. The materials upon which the summary is based need not themselves be admitted into evidence. See 6 Jack B. Weinstein & Margaret A. Berger, Weinstein’s Federal Evidence, § 1006.02 (Joseph M. McLaughlin, ed., 1999) [hereinafter Weinstein’s Federal Evidence]. Admission of summaries, however, is conditioned on the requirement that the evidence upon which they are based, if not admitted, must be admissible. See, e.g., Harris, 948 F.2d at 1525 (holding that Rule 1006 “clearly permits the use of a summary of business records provided ‘all of the records from which it is drawn are otherwise admissible’ ” (quoting State Office Sys., Inc. v. Olivetti Corp. of Am., 762[*1224] F.2d 843, 845 (10th Cir.1985))); Martin v. Funtime, Inc., 963 F.2d 110, 116 (6th Cir.1992); Weinstein’s Federal Evidence, § 1006.06[3]. A contrary result would inappropriately provide litigants with a means of avoiding rules governing the admission of evidence such as hearsay. See United States v. Johnson, 594 F.2d 1253, 1255 (9th Cir.1979) (“We do not believe that Congress intended that counsel could abrogate other restrictions on the admissibility— like the hearsay rule — by the use of summaries .... ”).

The telephone records from which the summaries were drawn are indubitably hearsay. The obligation of establishing the applicability of a hearsay exception for these records falls upon the government as the proponent of the evidence. See, e.g., United States v. Shirley, 884 F.2d 1130, 1133 (9th Cir.1989) (burden of proving admissibility of underlying materials is proponent’s). The pertinent hearsay exception for business records, Federal Rule of Evidence 803(6), contains multiple foundational hurdles which must be cleared before the summaries may be admitted. See United States v. Cestnik, 36 F.3d 904, 909-10 (10th Cir.1994). Rule 803(6) requires that the custodian or other qualified witness testify that (1) the records were made contemporaneously with the events and “kept in the course of a regularly conducted business activity,” and (2) “it was the regular practice of that business activity to make the [record].”[1] Fed.R.Evid. 803(6); cf. United States v. Reilly, 33 F.3d 1396, 1414 (3d Cir.1994).

No effort whatsoever was made to establish the foundational requirements of Rule 803(6) for admissibility of the underlying telephone records. Even when faced with a hearsay objection, the government failed to sponsor a single witness or even ask a single question of any witness in order to lay a foundation for application of the business records exception. The district court made an error of law by not requiring the government to lay the requisite foundation or forgo the use of the summaries, and thus abused its discretion in admitting the summaries. See Timberlake Constr. Co. v. U.S. Fidelity & Guar. Co., 71 F.3d 335, 341-42 (10th Cir.1995) (admission of documents not comporting with 803(6) foundational requirements was error).

Such error, however, does not necessarily end the appellate inquiry. Federal Rule of Criminal Procedure 52(a) provides that an error “which does not affect substantial rights shall be disregarded.” Fed.R.Crim.P. 52(a); see also United States v. Charley, 176 F.3d 1265, 1281-84 (10th Cir.1999) (inquiring into whether the error had a “substantial influence” on the verdict or whether the court is left in “grave doubt” as to whether the evidence had such an effect (quoting United States v. Rivera, 900 F.2d 1462, 1469 (10th Cir.1990) (en banc))). Although the government makes no assertion whatsoever that the admission of these summaries without adequate foundation was harmless error, this court may in its discretion “initiate harmless error review in an appropriate case.” United States v. Torrez-Ortega, 184 F.3d 1128 (10th Cir.1999) (quotation omitted). In Torrez-Ortega, this court cited with approval three factors suggested by the Seventh Circuit in determining whether an appellate court should address[*1225] harmlessness when the government has failed to do so: (1) the length and complexity of the record; (2) whether the harmlessness of the errors is certain or debatable; and (3) whether a reversal would result in protracted, costly, and futile proceedings in the district court.[2] See id. (citing United States v. Giovannetti, 928 F.2d 225, 227 (7th Cir.1991)).

The 2350 page record, over half of which constitutes trial transcript from a six-day jury trial, is lengthy. The length of the record is equaled or exceeded by its complexity. Samaniego and his co-defendant were indicted on over 70 counts, all addressed to their alleged participation in a several-dozen member multi-state conspiracy to distribute several tons of marijuana. Thirty of Samaniego’s thirty-one convictions involve discrete and specific transactions with many different co-conspirators, each requiring separate proof.[3] The record itself is abysmally inadequate for a harmless-error review. For example, the sole exhibits in the record are the summaries, constituting only 8 of the over 100 exhibits admitted during trial. As a consequence, significant documentary evidence, such as the purportedly consistent travel documents, is missing.

The summaries did not play a small role in the trial. Reference to the summaries is woven throughout the fabric of the government’s closing. The government related the telephone activity in the summaries to travel records, which are not part of the record to review for harmless error, and the testimony of accomplices who had pleaded guilty and whose character was acknowledged by the prosecutor in closing to be questionable.

An unsolicited, unassisted, and undirected harmless-error review of an incomplete record to search for and evaluate independent evidence to support Samaniego’s thirty-one separate convictions would be lengthy, complex, and dangerous. Furthermore, while the government’s brief lists the requirements of Rule 1006, it never even addresses the error in this case, i.e., the failure to establish the admissibility of the underlying telephone records. The government compounds its default by failing to even suggest that the error was harmless, even in the face of the defendant’s preemptive argument in his opening brief that the error was not harmless. This silence on the issue of harmlessness and the failure to provide an adequate record to review suggests acquiescence in reversal. See Giovannetti, 928 F.2d at 226 (stating that government’s failure to address harmlessness when defendant had discussed issue in opening brief suggested that the government acquiesced that any error was prejudicial).

In light of the length and complexity of proceedings, the apparent prominence of the erroneously admitted summaries, and the government’s complete and inexplica[*1226] ble failure to address the issue and provide this court with guidance or even a record, this court declines to exercise its discretion to review the harmlessness of the erroneously admitted summaries. The judgement of the United States District Court for the Western District of Oklahoma is REVERSED and this matter is REMANDED.

1

In certain circumstances, a foundation for admissibility can be established by judicial notice of the nature of the business and "the nature of the records as observed by the court,' particularly in the case of bank and similar statements.” United States v. Johnson, 971 F.2d 562, 571 (10th Cir.1992) (emphasis added) (quotation omitted). Unlike Johnson, the record here is not "replete with circumstances demonstrating the trustworthiness of the documents.” Id. None of the underlying documents was ever admitted; there is no indication that the district judge ever saw them; and the record fails to justify their inclusion in the class of records commonly viewed as particularly trustworthy, such as bank records. Finally, consistent with the government failing to even acknowledge the existence of a hearsay issue, see infra, the government has at no time suggested judicial notice as á means to satisfy the foundational requirements.

2

It is unclear what the third factor contributes to a court’s decision in determining whether to exercise its discretion to sua sponte address the issue of harmlessness. Without eviscerating the doctrine, cost and potentially protracted proceedings cannot preclude reversal if an error was not harmless. Moreover, a court could conclude that reversal would be futile only by undertaking the very harmless error review it seeks to ascertain whether it should conduct. Additionally, it is difficult to imagine how a court could conclude that reversal would be futile if it has already concluded under the second Giovannetti factor that the harmlessness of the error is not certain. Perhaps confusion about what the third factor contributes to the analysis has caused this and other courts to merely reference but not apply it. See United States v. Torrez-Ortega, 184 F.3d 1128, 1136-37 (10th Cir.1999); United States v. Pryce, 938 F.2d 1343, 1348 n. 4 (D.C.Cir.1991) (Williams, J., separate opinion) (citing Giov-annetti favorably but stating that “[t]he role of the third factor is unclear”); see also United States v. McLaughlin, 126 F.3d 130, 135 (3rd Cir.1997) (even though reversal would be "costly,” the complexity of the record and the uncertainty of the harm warranted vacating conviction). Nevertheless, depending upon the facts, the third factor may simply be irrelevant in cases such as this.

3

Samaniego was also convicted on conspiracy to possess with intent to distribute marijuana from 1994 to 1997, in violation of 21 U.S.C. § 841(a)(1).

Dissent

TACHA, Circuit Judge,

dissenting.

I respectfully dissent. While I agree with the majority that the district court improperly admitted the telephone record summaries, I am convinced that we should apply a harmless error analysis. The majority correctly notes that we may initiate harmless error review sua sponte, despite the government’s failure to raise this argument. Even in complicated drug cases like this one, it is incumbent upon us to scrutinize the record to determine whether harmless error analysis is appropriate. In my mind, this is an appropriate case for harmless error review because the record contains overwhelming evidence that the defendant, Rolando Samaniego, actively participated in a marijuana importation and distribution conspiracy over a period of years from 1994 to early 1997.

An erroneous evidentiary ruling is considered harmless unless it affects a substantial right of a party. See United States v. Charley, 176 F.3d 1265, 1282 (10th Cir.1999) (citing Fed.R.Evid. 103(a)). An error affecting a substantial right must have had a “substantial influence on the outcome or ... leave[ ] one in grave doubt as to whether it had such effect.” Id. (internal quotation marks and citation omitted).

The government charged Samaniego with one count of conspiracy in violation of 21 U.S.C. § 846, thirteen counts of traveling or using a facility in interstate commerce to facilitate an unlawful activity, 18 U.S.C. § 1952(a)(3), and seventeen counts of possession of a controlled substance with intent to distribute, 21 U.S.C. § 841(a)(1). The majority focuses on the thirty specific counts, asserting that the telephone records are potentially essential evidence for proving these offenses. However, the government presented at least seven witnesses who had direct and sustained contact with defendant in his capacity as a leader in the drug conspiracy. Maria Valle testified how Samaniego used her house in Oklahoma City to store and distribute thousands of pounds of marijuana brought up from Mexico in 1994. Gerardo Gutierrez-Moreno explained how Samaniego solicited him to drive drug shipments from near El Paso, Texas, to Oklahoma City and how he delivered those shipments to Samaniego in Oklahoma City. James Lee Pleskac, Pete Ford, and Gerald Chillas admitted to driving shipments from Texas to Oklahoma City as a part of the operation, and Ples-kac and Ford testified that Samaniego was a part of the conspiracy. Jeff Mosby was hired by defendant to help transport marijuana, and he personally witnessed defendant weighing, sorting, and distributing hundreds of pounds of marijuana. The defendant also used Mosby’s house to store his drug shipments in 1995, after Maria Valle’s house was no longer available. Matthew Fernandez testified about buying marijuana from defendant from 1994 to 1996. Finally, Drug Enforcement Administration (“DEA”) Special Agent Timothy Jones testified that in September of 1994, he brought a shipment to defendant in Oklahoma City while serving in an undercover capacity.

Almost all of these witnesses put Rolando Samaniego at the center of a drug conspiracy that brought tons of marijuana from Mexico to Texas and then to Oklahoma City. Many of them corroborated each other’s testimony in important ways. For example, several of them brought shipments to Samaniego at Maria Valle’s house. This direct witness testimony provided extremely strong proof of defendant’s criminal activity. The conspiracy charge, at the very least, has overwhelming support in the record. “To obtain a conviction for conspiracy the government must show [1] that two or more persons agreed to violate the law, [2] that the[*1227] Defendant knew at least the essential objectives of the conspiracy, ... [3] that the Defendant knowingly and voluntarily became a part of it, and [4] that the alleged coconspirators were interdependent.” United States v. Ivy, 83 F.3d 1266, 1285 (10th Cir.1996) (internal quotation marks and citations omitted). The government more than met this burden with only the above-mentioned testimony. In light of this evidence, the admission of the disputed telephone record summaries could not have had a substantial influence on the outcome of the case with respect to the conspiracy charge and several of the individual charges. Cf. United States v. Wilson, 134 F.3d 855, 867 (7th Cir.) (exercising discretion and finding harmless error in drug conspiracy conviction where government presented overwhelming evidence against defendant at trial), cert. denied, - U.S. -, 119 S.Ct. 216, 142 L.Ed.2d 178 (1998); Lufkins v. Leapley, 965 F.2d 1477, 1482 (8th Cir.1992) (exercising discretion and finding harmless error where record in procedurally complicated case consisted only of the trial transcript, which included a confession and corroborating evidence).

Additionally, I am compelled to comment on the factors discussed by the majority in determining whether to apply a harmless error analysis. As the majority points out, this Circuit recently cited with approval United States v. Giovannetti, 928 F.2d 225, 227 (7th Cir.1991), in which the Seventh Circuit enunciated three factors to guide a court in determining whether to conduct a harmless error analysis when the government waives the issue. See United States v. Torrez-Ortega, 184 F.3d 1128, 1135-37 (10th Cir.1999). Those factors are the length and complexity of the record, the certainty of the harmlessness, and the cost and futility of proceedings in the event of a reversal. I agree with the majority that the third Giovannetti factor does not assist in the analysis of whether to exercise our discretion. See Majority Op. at n. 2; I further doubt the utility of the'first factor. I am especially concerned that a court facing a large record might-rely heavily or exclusively on the first factor in refusing to exercise discretion to apply harmless error. In my judgment, an appellate court cannot be excused from its duty to study a record, even in exercising the broadest scope of its discretionary review, just because a record is lengthy and/or complicated. The scope of a record does not excuse the appellate court from reviewing it and attempting to determine whether harmless error analysis is appropriate. Indeed, I fail to see how we could ever make a rational judgment on the second factor — whether the harmlessness of the error is certain or debatable — without scrutinizing for ourselves the full record, regardless of its length or complexity.[4] The complexity of a record should not by itself play a part in our analysis. Rather, a complex record might be a factor that impacts our certainty of the harmlessness of the error.

Thus, I look only to the second factor— whether the harmlessness of the error is certain or debatable. This, it seems to me, is the crux of harmless error review and the touchstone for our analysis. If harmlessness is debatable, it is hard to conclude that the error is harmless or, in this context, that the court should exercise its discretionary prerogative to undertake a formal harinless error review. If, however, on the record before the court, the harmlessness is certain, the appellate court should be much more willing to exercise its discretion and engage in a thorough harmless error analysis.

[*1228] When the government fails to argue harmless error on appeal, I hold the firm view that our appellate review responsibility requires us to carefully examine the record before us and decide whether to exercise our discretion to employ harmless error review based not on the scope of the record, but on the level of our certainty that the error was harmless. Based on my review of this record, I am sufficiently certain that the error in admitting the telephone summaries was harmless with respect to at least some of the convictions that I would exercise our discretion to conduct a harmless error analysis. I therefore respectfully dissent.

4

The court in Torrez-Ortega demonstrates this point. The court first notes the extensive nature of the record and then explains that the harmlessness of admitting testimony in violation of the Confrontation Clause was “at best debateable.” Torrez-Ortega, 184 F.3d at 1136-37. It then concluded, "Our independent review of the full record does not readily persuade us that the error is harmless....” Id. (emphasis added). Thus, the court had to review the entire record, even though it was large and complex, in order to determine whether to invoke its discretion to apply harmless error review.