158 Colorado opinions name it 2 courts 1985–2026 92 in the last five years
The cases below were cited by Colorado courts in a sentence that names this issue. Sides come from how each citing opinion treated the case (Syfertize flag on that citation), so a case can appear on both: that is where the law is contested. A red or yellow chip is the case's own overall treatment.
| Case | Followed | Cited |
|---|---|---|
Strickland v. Washingtongreen2 sentences2026As the United States Supreme Court has long recognized, “the right to counsel is the right to the effective assistance of counsel.” Strickland v. Washington, 466 U.S. 668, 686 (1984) (citation omitted). ¶ 14 “In order to prevail on an ineffective assistance of counsel claim, a defendant must prove that 1) counsel’s performance was deficient and 2) the deficient performance prejudiced the defense.” Dunlap v. People, 173 P.3d 1054, 1062 (Colo. 2007) (citing Strickland, 466 U.S. at 687 ). 2026As the United States Supreme Court has long recognized, “the right to counsel is the right to the effective assistance of counsel.” Strickland v. Washington, 466 U.S. 668, 686 (1984) (citation omitted). ¶ 14 “In order to prevail on an ineffective assistance of counsel claim, a defendant must prove that 1) counsel’s performance was deficient and 2) the deficient performance prejudiced the defense.” Dunlap v. People, 173 P.3d 1054, 1062 (Colo. 2007) (citing Strickland, 466 U.S. at 687 ). | 40 | 67 |
Dunlap v. Peoplegreen2 sentences2026As the United States Supreme Court has long recognized, “the right to counsel is the right to the effective assistance of counsel.” Strickland v. Washington, 466 U.S. 668, 686 (1984) (citation omitted). ¶ 14 “In order to prevail on an ineffective assistance of counsel claim, a defendant must prove that 1) counsel’s performance was deficient and 2) the deficient performance prejudiced the defense.” Dunlap v. People, 173 P.3d 1054, 1062 (Colo. 2007) (citing Strickland, 466 U.S. at 687 ). 2026“In order to prevail on an ineffective assistance of counsel claim, a defendant must prove that 1) counsel’s performance was deficient and 2) the deficient performance prejudiced the defense.” Dunlap v. People, 173 P.3d 1054 , 1062 (Colo. 2007). | 20 | 23 |
People in Interest of A.Rgreen2 sentences2026See A.R. v. D.R., 2020 CO 10 , ¶ 47. ¶ 47 In evaluating a claim of ineffective assistance of counsel in a termination proceeding, we apply the same test we use when evaluating an ineffective assistance of counsel claim in a criminal case. 2025See A.R. v. D.R., 2020 CO 10 , ¶ 47; see also People in Interest of C.H., 166 P.3d 288 , 290 (Colo. App. 2007). ¶ 17 In evaluating a claim of ineffective assistance of counsel in a termination proceeding, we apply the same test that we would when evaluating an ineffective assistance of counsel claim in a criminal case. | 12 | 17 |
People v. Kellinggreen2 sentences2026See People v. Kelling, 151 P.3d 650, 655 (Colo. App. 2006) (“[B]ecause of the need for a developed factual record, an ineffective assistance of counsel claim should ordinarily be raised in a postconviction proceeding, not on direct appeal.”). 8 1. 2025See Kelling, 151 P.3d at 655 (“[B]ecause of the need for a developed factual record, an ineffective assistance of counsel claim should ordinarily be raised in a postconviction proceeding, not on direct appeal.”). | 10 | 10 |
People Ex Rel. Chgreen2 sentences2025See 12 A.R. v. D.R., 2020 CO 10 , ¶ 47; see also People in Interest of C.H., 166 P.3d 288 , 290 (Colo. App. 2007). ¶ 23 In evaluating a claim of ineffective assistance of counsel in termination proceedings, we apply the same test that we would when evaluating an ineffective assistance of counsel claim in a criminal case. 2025See A.R. v. D.R., 2020 CO 10 , ¶ 47; see also People in Interest of C.H., 166 P.3d 288 , 290 (Colo. App. 2007). ¶ 17 In evaluating a claim of ineffective assistance of counsel in a termination proceeding, we apply the same test that we would when evaluating an ineffective assistance of counsel claim in a criminal case. | 9 | 13 |
Ardolino v. Peoplegreen2 sentences2025People v. Hardin, 2016 COA 175, ¶ 39 . 3 ¶8 “A criminal defendant is constitutionally entitled to effective assistance from his counsel.” Ardolino v. People, 69 P.3d 73, 76 (Colo. 2003). “[T]o prevail on an ineffective assistance of counsel claim, a defendant must prove that 1) counsel’s performance was deficient and 2) the deficient performance prejudiced the defense.” Dunlap v. People, 173 P.3d 1054, 1062 (Colo. 2007). 2025Governing Law and Standard of Review ¶ 30 “A criminal defendant is constitutionally entitled to effective assistance from his counsel.” Ardolino v. People, 69 P.3d 73, 76 (Colo. 2003). “[T]o prevail on an ineffective assistance of counsel claim, a defendant must prove that 1) counsel’s performance was deficient and 2) the deficient performance prejudiced the defense.” Dunlap v. People, 173 P.3d 1054, 1062 (Colo. 2007). | 9 | 12 |
People v. Aguilargreen2 sentences2026People v. Aguilar, 2012 COA 181, ¶ 9 . 2024People v. Aguilar, 2012 COA 181, ¶ 9 . ¶ 16 Strickland’s familiar standard, however, does not always govern an ineffective assistance of counsel claim. | 5 | 9 |
Missouri v. Fryegreen2 sentences2025Lafler v. Cooper, 566 U.S. 156, 162 (2012); Missouri v. Frye, 566 U.S. 134, 144 (2012). ¶ 20 “[T]o prevail on an ineffective assistance of counsel claim, a defendant must prove that 1) counsel’s performance was deficient and 2) the deficient performance prejudiced the defense.” Dunlap v. People, 173 P.3d 1054, 1062 (Colo. 2007). 2025Lafler v. Cooper, 566 U.S. 156, 162 (2012); Missouri v. Frye, 566 U.S. 134, 144 (2012). “[A] defendant may challenge [a] guilty plea on the grounds of ineffective assistance of counsel when that challenge goes to the issue of whether the plea was knowingly, voluntarily, and intelligently entered.” People v. Stovall, 2012 COA 7M , ¶ 13, 284 P.3d 151, 154 . ¶ 17 To prevail on an ineffective assistance of counsel claim, “a defendant must prove that 1) counsel’s performance was deficient and 2) the deficient performance prejudiced the defense.” Dunlap v. People, 173 P.3d 1054, 1062 (Colo. 2007). | 5 | 5 |
v. Chalchi-Sevillagreen2 sentences2026People v. Chalchi-Sevilla, 2019 COA 75, ¶ 6 (citing Strickland v. Washington, 466 U.S. 668, 687 (1984)). 2025People v. 4 Chalchi-Sevilla, 2019 COA 75, ¶ 6 (citing Strickland, 466 U.S. at 687 ). ¶ 12 To establish deficient performance, a defendant must prove that counsel’s performance “fell below an objective standard of reasonableness.” Strickland, 466 U.S. at 688 . | 5 | 5 |
People v. Villarrealgreen2 sentences2012The court of appeals followed People v. Villarreal , 231 P.3d 29, 34 ( Colo.App. 2009 ) , which determined that the prejudice component of a plain error analysis is essentially identical to the prejudice component of an ineffective assistance of counsel analysis under Strickland . 2012The court of appeals followed People v. Villarreal, 231 P.3d 29, 34 (Colo.App.2009), which determined that the prejudice component of a plain error analysis is essentially identical to the prejudice component of an ineffective assistance of counsel analysis under Strickland. | 4 | 4 |
Lafler v. Coopergreen2 sentences2025Lafler v. Cooper, 566 U.S. 156, 162 (2012); Missouri v. Frye, 566 U.S. 134, 144 (2012). ¶ 20 “[T]o prevail on an ineffective assistance of counsel claim, a defendant must prove that 1) counsel’s performance was deficient and 2) the deficient performance prejudiced the defense.” Dunlap v. People, 173 P.3d 1054, 1062 (Colo. 2007). 2025Lafler v. Cooper, 566 U.S. 156, 162 (2012); Missouri v. Frye, 566 U.S. 134, 144 (2012). “[A] defendant may challenge [a] guilty plea on the grounds of ineffective assistance of counsel when that challenge goes to the issue of whether the plea was knowingly, voluntarily, and intelligently entered.” People v. Stovall, 2012 COA 7M , ¶ 13, 284 P.3d 151, 154 . ¶ 17 To prevail on an ineffective assistance of counsel claim, “a defendant must prove that 1) counsel’s performance was deficient and 2) the deficient performance prejudiced the defense.” Dunlap v. People, 173 P.3d 1054, 1062 (Colo. 2007). | 4 | 4 |
United States v. Cronicgreen2 sentences2025See People In Interest of T.M.S., 2019 COA 136, ¶ 63 (rejecting prejudice argument where parent failed to explain how testimony by witnesses that counsel should have called would have refuted the department’s evidence). ¶ 14 Relying on United States v. Cronic, 466 U.S. 648, 659 (1984), and People v. Robles, 74 P.3d 437, 439 (Colo. App. 2003), father argues that the familiar Strickland prejudice test doesn’t apply when an ineffective assistance of counsel claim arises from the total denial of the assistance of counsel. 2015For example, no additional showing of prejudice is required if counsel "entirely fails to subject the prosecution's case to meaningful adversarial testing" because counsel is either "totally absent, or prevented from assisting the accused during a critical stage of the proceeding." United States v. Cronic, 466 U.S. 648 , 659 & n. 25, 104 S.Ct. 2039 , 80 L.Ed.2d 657 (1984) ; see People v. Robles, 74 P.3d 437 , 439 (Colo. App. 2003) ("[T]he Strickland prejudice test does not apply at all when an ineffective assistance of counsel claim arises because of the actual or constructive total denial of | 4 | 4 |
People v. Karpierzgreen2 sentences2024People v. Karpierz, 165 P.3d 753, 759 (Colo. App. 2006). ¶ 15 The constitutional right to effective assistance of counsel includes the right to conflict-free counsel. 2024People v. Karpierz, 165 P.3d 753, 759 (Colo. App. 2006). ¶ 15 The constitutional right to effective assistance of counsel includes the right to conflict-free counsel. | 4 | 4 |
People v. Garciagreen2 sentences2026A court may resolve an ineffective assistance of counsel claim “solely on the basis that the defendant has failed in either regard.” People v. Romero, 2015 COA 7 , ¶ 25 (citing People v. Garcia, 815 P.2d 937, 941 (Colo. 1991)). 6 2. 2025A court may resolve an ineffective assistance of counsel claim “solely on the basis that the defendant has failed in either regard.” People v. Romero, 2015 COA 7 , ¶ 25 (citing People v. Garcia, 815 P.2d 937, 941 (Colo. 1991)). | 3 | 4 |
Weaver v. Massachusettsgreen2 sentences2026See Weaver v. Massachusetts, 582 U.S. 286, 300-01 (2017) (“[W]hen a defendant raises a public-trial violation via an ineffective-assistance-of-counsel claim, Strickland prejudice is not shown automatically. 2025The Court then concluded that, because “not every public-trial violation will in fact lead to a fundamentally unfair trial,” when a defendant “raises a public-trial violation via an ineffective-assistance-of-counsel claim, Strickland prejudice is not shown automatically.” Id. at 300-01 . | 3 | 3 |
People v. Longgreen2 sentences2024People v. Long, 126 P.3d 284, 286 (Colo. App. 2005). ¶ 15 An ineffective assistance of counsel claim can be denied without a hearing if the record establishes that “the defendant’s allegations, even if proven true, would fail to establish one or the other prong of the Strickland test.” Ardolino, 69 P.3d at 77 . 2024People v. Long, 126 P.3d 284, 286 (Colo. App. 2005). ¶ 15 An ineffective assistance of counsel claim can be denied without a hearing if the record establishes that “the defendant’s allegations, even if proven true, would fail to establish one or the other prong of the Strickland test.” Ardolino, 69 P.3d at 77 . | 3 | 3 |
People v. Sparksgreen2 sentences2015People v. Sparks , 914 P.2d 544, 547 (Colo. App. 1996). 2015People v. Sparks, 914 P.2d 544, 547 (Colo.App.1996). | 3 | 3 |
People v. Colegreen2 sentences2015See, e.g., People v. Cole, 775 P.2d 551, 554 (Colo.1989). 2014See, e.g., People v. Cole, 775 P.2d 551, 554 (Colo.1989). | 3 | 3 |
People v. Thomasgreen2 sentences2013See People v. Thomas, 867 P.2d 880, 886 (Colo.1994) ("In cases where the ineffective assistance of counsel claim can purportedly be shown on the record, a proper record on appeal may still require explanations by trial counsel about alleged incompetent acts or omissions, or expert testimony as to the requisite stan dard of care in the applicable legal community."). 2006See Ardolino v. People, 69 P.3d 73, 77 (Colo.2003)(“In light of the considerations potentially involved in determining ineffective assistance, defendants have regularly been discouraged from attempting to litigate their counsels’ effectiveness on direct appeal.”); People v. Thomas, 867 P.2d 880, 886 (Colo.1994)(“[T]his court has expressed a preference for having ineffective assistance of counsel claims brought in Crim. | 3 | 3 |
People v. Washingtongreen2 sentences2025Strickland v. Washington, 466 U.S. 668, 687 (1984); see People v. Washington, 2014 COA 41, ¶ 18 . 2025Strickland v. Washington, 466 U.S. 668, 687 (1984); see People v. Washington, 2014 COA 41, ¶ 18 . | 2 | 2 |
Davis v. Peoplegreen2 sentences2025Strickland v. Washington, 466 U.S. 688, 697 (1984); Davis v. People, 871 P.2d 769, 772 (Colo. 1994). 2006See Davis v. People, 871 P.2d 769 (Colo.1994) (to establish ineffective assistance of counsel, defendant must prove that defense counsel’s performance was deficient and that the deficient performance prejudiced him). | 2 | 2 |
People v. Roblesgreen2 sentences2025See People In Interest of T.M.S., 2019 COA 136, ¶ 63 (rejecting prejudice argument where parent failed to explain how testimony by witnesses that counsel should have called would have refuted the department’s evidence). ¶ 14 Relying on United States v. Cronic, 466 U.S. 648, 659 (1984), and People v. Robles, 74 P.3d 437, 439 (Colo. App. 2003), father argues that the familiar Strickland prejudice test doesn’t apply when an ineffective assistance of counsel claim arises from the total denial of the assistance of counsel. 2015For example, no additional showing of prejudice is required if counsel "entirely fails to subject the prosecution's case to meaningful adversarial testing" because counsel is either "totally absent, or prevented from assisting the accused during a critical stage of the proceeding." United States v. Cronic, 466 U.S. 648 , 659 & n. 25, 104 S.Ct. 2039 , 80 L.Ed.2d 657 (1984) ; see People v. Robles, 74 P.3d 437 , 439 (Colo. App. 2003) ("[T]he Strickland prejudice test does not apply at all when an ineffective assistance of counsel claim arises because of the actual or constructive total denial of | 2 | 2 |
Hill v. Lockhartgreen2 sentences2025People v. Duran, 2025 COA 34, ¶ 16 ; Strickland, 466 U.S. at 687 ; see also Hill v. Lockhart, 474 U.S. 52, 57 (1985) (applying the Strickland test to ineffective assistance of counsel claims in cases involving guilty pleas). 2025See People v. Corson, 2016 CO 33, ¶ 35 (citing Hill v. Lockhart, 474 U.S. 52 , 58- 59 (1985)). ¶ 30 Failure to prove either prong is fatal to an ineffective assistance of counsel claim. | 2 | 2 |
People v. Corsongreen2 sentences2025See People v. Corson, 2016 CO 33, ¶ 35 (citing Hill v. Lockhart, 474 U.S. 52 , 58- 59 (1985)). ¶ 30 Failure to prove either prong is fatal to an ineffective assistance of counsel claim. 2024Strickland v. Washington , 466 U.S. 668, 687 (1984); see Corson , ¶ 35 (if a defendant has failed to show prejudice, a court may resolve an ineffective assistance of counsel claim on t hat basis and need not address whether counsel’s performance w as deficient) . ¶ 15 The district court has broad discretion to determine wh ether the defendant has established a fair and just reason to wi thdraw a guilty plea. | 2 | 2 |
| Peo v. Housergreen | 2 | 2 |
| People v. Melillogreen | 2 | 2 |
| Griffin v. McNeilgreen | 2 | 2 |
| People in Interest of PNgreen | 2 | 2 |
Cuyler v. Sullivangreen2 sentences2015And as relevant here, "a defendant who shows that a conflict of interest actually affected the adequacy of his representation need not demonstrate prejudice in order to obtain relief." Cuyler v. Sullivan, 446 U.S. 335 , 345-50, 100 S.Ct. 1708 , 64 L.Ed.2d 333 (1980). 2009However, "a defendant who shows that a conflict of interest actually affected the adequacy of his [or her] representation need not demonstrate prejudice in order to obtain relief" Id. at 349-50, 100 S.Ct. at 1719 ; see also People v. Miera, 183 P.3d 672, 677 (Colo.App.2008) (concluding that Cuyler provides the appropriate standard to analyze an ineffective assistance of counsel claim based on a conflict of interest); People v. Kelling, 151 P.3d 650, 657 (Colo.App.2006) ("Where, as here, the trial court neglects to inquire into a potential conflict, a defendant, to obtain reversal, must show th | 1 | 6 |
v. Wardellgreen2 sentences2026Accordingly, “[w]here the evidence in the 3 record supports the findings and holding of the postconviction court that presided over an evidentiary hearing, the judgment will not be disturbed on review.” People v. Wardell, 2020 COA 47, ¶ 27 . ¶9 To succeed on an ineffective assistance of counsel claim, the defendant must establish that (1) counsel’s performance was deficient, meaning it fell below an objective standard of reasonableness; and (2) counsel’s deficient performance prejudiced the defendant, meaning that a reasonable probability exists that, but for counsel’s deficient performance, t 2025Accordingly, “[w]here the evidence in the record supports the findings and holding of the postconviction court that presided over an evidentiary hearing, the judgment will not be disturbed on review.” People v. Wardell, 2020 COA 47, ¶ 27 . ¶ 23 To succeed on an ineffective assistance of counsel claim, the defendant must establish that (1) counsel’s performance was deficient, meaning it fell below an objective standard of reasonableness; and (2) counsel’s deficient performance prejudiced the defendant. | 1 | 3 |
Silva v. Peoplegreen2 sentences2025See Silva, 156 P.3d at 1168-69 . ¶ 16 To prevail on an ineffective assistance of counsel claim, a defendant must prove by a preponderance of the evidence that (1) defense counsel’s performance was deficient and (2) counsel’s deficient performance prejudiced the defendant. 2024Strickland v. Washington, 466 U.S. 668, 687 (1984); Dunlap v. People, 173 P.3d 1054, 1061-62 (Colo. 2007); Silva, 156 P.3d at 1169 . | 1 | 2 |
| People v. Currengreen | 1 | 2 |
| People v. Blehmgreen | 1 | 2 |
| People v. Whitegreen | 1 | 1 |
| West v. People Cano v. Peoplegreen | 1 | 1 |
| People v. Rodriguezgreen | 1 | 1 |
| People in Interest of E.D.green | 1 | 1 |
| Swisher v. Phillipsgreen | 1 | 1 |
| People v. Newmillergreen | 1 | 1 |
| People v. Chambersgreen | 1 | 1 |
| Case | Negative | Cited |
|---|---|---|
| No negative-treatment citations attached to this issue in Colorado. Read the followed side critically anyway. | ||
| Case | Cited | Years |
|---|---|---|
People in re S.L. and A.L
green
2 sentences2025II); People in Interest of S.L., 2017 COA 160, ¶ 58 ; People in Interest of C.H., 166 P.3d 288 , 290 (Colo. App. 2007). ¶ 70 To successfully make an ineffective assistance of counsel claim, a parent must show that (1) counsel’s performance was outside the wide range of professionally competent assistance, and (2) counsel’s errors prejudiced the parent. 2024A.R. v. D.R. , 2020 CO 10 ; People in Interest of S.L. , 2017 COA 160, ¶ 58 ; People in Interest of C.H. , 166 P.3d 288, 290 (Colo. App. 2007). ¶ 68 To successfully make an ineffective assistance of counsel claim, a parent must show that (1) counsel’s performance was outside the wide range of professionally competent assistanc e and (2) the parent was prejudiced by counsel’s errors. | 7 | 2024–2025 |
in Interest of C.B
green
2 sentences2026Id. 31 ¶ 64 First, father asserts that his attorney provided ineffective assistance by failing to “object to improper venue.” But father cannot establish deficient performance because his attorney, in fact, moved to change venue under section 19-3-201(2), C.R.S. 2025, and only withdrew the motion at father’s request. 2026Id. | 4 | 2025–2026 |
People v. Stovall
green
2 sentences2025Lafler v. Cooper, 566 U.S. 156, 162 (2012); Missouri v. Frye, 566 U.S. 134, 144 (2012). “[A] defendant may challenge [a] guilty plea on the grounds of ineffective assistance of counsel when that challenge goes to the issue of whether the plea was knowingly, voluntarily, and intelligently entered.” People v. Stovall, 2012 COA 7M , ¶ 13, 284 P.3d 151, 154 . ¶ 17 To prevail on an ineffective assistance of counsel claim, “a defendant must prove that 1) counsel’s performance was deficient and 2) the deficient performance prejudiced the defense.” Dunlap v. People, 173 P.3d 1054, 1062 (Colo. 2007). 2016Strickland , 466 U.S. at 687 , 104 S.Ct. 2052 ; Ardolino v. People , 69 P.3d 73 , 76 (Colo. 2003). ¶ 15 To satisfy the prejudice prong in the context of a guilty plea, the defendant must show that there is a reasonable probability that "but for counsel's errors, he would not have pleaded guilty and would have insisted *1162 on going to trial." People v. Stovall , 2012 COA 7 , ¶ 19, 284 P.3d 151 (citation omitted). ¶ 16 In determining whether counsel's performance was deficient, we evaluate the representation from counsel's perspective at the time of the representation, and we "indulge a strong | 2 | 2016–2025 |
| People Ex Rel. Ag green | 2 | 2013–2020 |
| Hagos v. People green | 2 | 2016–2016 |
| People v. Castro green | 2 | 2007–2007 |
| Perry v. Leeke green | 2 | 1996–1996 |
| People v. Duran green | 1 | 2026–2026 |
| v. Timoshchuk green | 1 | 2026–2026 |
| v. Thompson green | 1 | 2025–2025 |
| People v. Duran green | 1 | 2025–2025 |
| People v. Man Hao Luong green | 1 | 2025–2025 |
| Swainson v. People green | 1 | 2025–2025 |
| People v. Hardin green | 1 | 2025–2025 |
| People v. Garner green | 1 | 2021–2021 |
| People v. Trujillo green | 1 | 2021–2021 |
| People v. Villanueva green | 1 | 2019–2019 |
| People v. White green | 1 | 2019–2019 |
| Mickens v. Taylor green | 1 | 2019–2019 |
| People v. Vigil green | 1 | 2019–2019 |
| People v. Villanueva green | 1 | 2019–2019 |
| Duval v. State green | 1 | 2018–2018 |
| Owens v. United States green | 1 | 2015–2015 |
| James Brown v. Christopher Artuz green | 1 | 2015–2015 |
Counted by distinct opinions that both name this issue and are annotated to the section; sections every opinion cites regardless of issue are not filtered here, so read the counts against the total above.
Opinions by the citing court's state. A doctrine retained in one state and abandoned in another shows up here as a year span that stalls.