59 Illinois opinions name it 2 courts 1977–2026 32 in the last five years
The cases below were cited by Illinois 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 sentences2026“An error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment. *** Accordingly, any deficiencies in counsel’s performance must be prejudicial to the defense in order to constitute ineffective assistance under the Constitution.” Id. at 691-92 . ¶ 96 “When addressing a claim of plain error and an alternative claim of ineffective assistance of counsel, appellate courts first consider whether the defendant has established a clear or obvious error. ‘Absent a clear or obvious error ***, neith 2026“An error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment.” Strickland, 466 U.S. at 691 (citing United States v. Morrison, 449 U.S. 361, 364-65 (1981)). | 6 | 52 |
People v. Johnsongreen2 sentences2026See People v. Givens, 237 Ill. 2d 311, 331 (2010) (“If it is easier to dispose of an ineffective assistance claim on the ground that it lacks sufficient prejudice, then a court may proceed directly to the second prong and need not determine whether counsel’s performance was deficient.” (citing Strickland, 466 U.S. at 697 )). ¶ 57 “With respect to Strickland’s prejudice prong, ‘[a]n error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment.’” People v. Johnson, 2021 IL 126291, ¶ 54 (quot 2025People v. Hibbler, 2019 IL App (4th) 160897, ¶ 88 . “[I]f it is easier to dispose of an ineffective-assistance claim on the ground that it lacks a showing of sufficient prejudice, a court may proceed directly to Strickland’s prejudice prong and need not determine whether counsel’s performance was deficient.” People v. Johnson, 2021 IL 126291, ¶ 53 . “ ‘[A]n error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment.’ ” People v. Johnson, 2021 IL 126291, ¶ 54 (quoting Strickland, 466 U.S. | 5 | 7 |
People v. Givensgreen2 sentences2026See People v. Givens, 237 Ill. 2d 311, 331 (2010) (“If it is easier to dispose of an ineffective assistance claim on the ground that it lacks sufficient prejudice, then a court may proceed directly to the second prong and need not determine whether counsel’s performance was deficient.” (citing Strickland, 466 U.S. at 697 )). ¶ 57 “With respect to Strickland’s prejudice prong, ‘[a]n error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment.’” People v. Johnson, 2021 IL 126291, ¶ 54 (quot 2021People v. Givens, 237 Ill. 2d 311, 331 (2010). ¶ 54 With respect to Strickland’s prejudice prong, “[a]n error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment.” Strickland, 466 U.S. at 691 . | 2 | 2 |
United States v. Morrisongreen2 sentences2026“An error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment.” Strickland, 466 U.S. at 691 (citing United States v. Morrison, 449 U.S. 361, 364-65 (1981)). 2023“An error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment.” Strickland, 466 U.S. at 691 (citing United States v. Morrison, 449 U.S. 361 , 364–65 (1981)). | 1 | 5 |
People v. Manninggreen1 sentence2026“Matters of trial strategy are generally immune from claims of ineffective assistance of [trial] counsel.” (Internal quotation marks omitted.) People v. Manning, 241 Ill. 2d 319, 327 (2011). ¶ 29 “An error by [trial] counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment. *** Accordingly, any deficiencies in [trial] counsel’s performance must be prejudicial to the defense in order to constitute ineffective assistance under the Constitution.” Strickland, 466 U.S. at 691 - 92. “[D]efendant must | 1 | 1 |
Harrington v. Richtergreen2 sentences2026In assessing prejudice, “‘the question is not whether a court can be certain counsel’s performance had no effect on the outcome or whether it is possible a reasonable doubt might have been established if counsel acted differently.’” Id. (quoting Harrington v. Richter, 562 U.S. 86, 111 (2011)). “‘Instead, Strickland asks whether it is “reasonably likely” the result would have been different.’” Id. (quoting Harrington, 562 U.S. at 111 ). 2026In assessing prejudice, “‘the question is not whether a court can be certain counsel’s performance had no effect on the outcome or whether it is possible a reasonable doubt might have been established if counsel acted differently.’” Id. (quoting Harrington v. Richter, 562 U.S. 86, 111 (2011)). “‘Instead, Strickland asks whether it is “reasonably likely” the result would have been different.’” Id. (quoting Harrington, 562 U.S. at 111 ). | 1 | 1 |
People v. Reidgreen1 sentence2026People v. Bryant, 128 Ill. 2d 448, 458 (1989); People v. Reid, 179 Ill. 2d 297, 310 (1997). ¶ 88 “An error by [trial] counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment. *** Accordingly, any deficiencies in [trial] counsel’s performance must be prejudicial to the defense in order to constitute ineffective assistance under the Constitution.” Strickland, 466 U.S. at 691 - 92. | 1 | 1 |
People v. Bryantgreen1 sentence2026People v. Bryant, 128 Ill. 2d 448, 458 (1989); People v. Reid, 179 Ill. 2d 297, 310 (1997). ¶ 88 “An error by [trial] counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment. *** Accordingly, any deficiencies in [trial] counsel’s performance must be prejudicial to the defense in order to constitute ineffective assistance under the Constitution.” Strickland, 466 U.S. at 691 - 92. | 1 | 1 |
People v. Evansgreen1 sentence2025Strickland, 466 U.S. at 697 ; People v. Evans, 186 Ill. 2d 83, 93 (1999). “ ‘An error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment.’ ” Sanchez, 169 Ill. 2d at 487 (quoting Strickland, 466 U.S. at 691 ). | 1 | 1 |
People v. Sanchezgreen2 sentences2025Strickland, 466 U.S. at 697 ; People v. Evans, 186 Ill. 2d 83, 93 (1999). “ ‘An error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment.’ ” Sanchez, 169 Ill. 2d at 487 (quoting Strickland, 466 U.S. at 691 ). 2025People v. Cherry, 2016 IL 118728, ¶ 30 (citing Strickland, 466 U.S. at 688, 694 ); see also Sanchez, 169 Ill. 2d at 487 (finding that an error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment). ¶ 41 For the foregoing reasons, the judgment of the circuit court of Kane County is affirmed. ¶ 42 Affirmed. - 16 - | 1 | 1 |
People v. Cherrygreen1 sentence2025People v. Cherry, 2016 IL 118728, ¶ 30 (citing Strickland, 466 U.S. at 688, 694 ); see also Sanchez, 169 Ill. 2d at 487 (finding that an error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment). ¶ 41 For the foregoing reasons, the judgment of the circuit court of Kane County is affirmed. ¶ 42 Affirmed. - 16 - | 1 | 1 |
People v. Westgreen1 sentence2021People v. West, 187 Ill. 2d 418, 432 (1999). | 1 | 1 |
| Case | Negative | Cited |
|---|---|---|
| No negative-treatment citations attached to this issue in Illinois. Read the followed side critically anyway. | ||
| Case | Cited | Years |
|---|---|---|
People v. Jones
green
1 sentence2026“An error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment. *** Accordingly, any deficiencies in counsel’s performance must be prejudicial to the defense in order to constitute ineffective assistance under the Constitution.” Id. at 691-92 . ¶ 96 “When addressing a claim of plain error and an alternative claim of ineffective assistance of counsel, appellate courts first consider whether the defendant has established a clear or obvious error. ‘Absent a clear or obvious error ***, neith | 1 | 2026–2026 |
People v. Hibbler
green
1 sentence2025People v. Hibbler, 2019 IL App (4th) 160897, ¶ 88 . “[I]f it is easier to dispose of an ineffective-assistance claim on the ground that it lacks a showing of sufficient prejudice, a court may proceed directly to Strickland’s prejudice prong and need not determine whether counsel’s performance was deficient.” People v. Johnson, 2021 IL 126291, ¶ 53 . “ ‘[A]n error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment.’ ” People v. Johnson, 2021 IL 126291, ¶ 54 (quoting Strickland, 466 U.S. | 1 | 2025–2025 |
People v. Lewis
green
1 sentence2023People v. Lewis, 2022 IL 126705, ¶ 46 . | 1 | 2023–2023 |
People v. Carwell
green
1 sentence2022Rather, “[t]he defendant must show that - 11 - 2022 IL App (2d) 200495 there is a reasonable probability that, but for counsel’s unprofessional errors, the result of the proceeding would have been different. | 1 | 2022–2022 |
People v. Hale
green
1 sentence2022“An error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment.” Id. at 691 (citing United States v. Morrison, 449 U.S. 361 , 364–65 (1981)). ¶ 66 Barrier’s statements could not change the outcome on retrial nor do they undermine our confidence in the outcome of the proceedings. | 1 | 2022–2022 |
People v. Domagala
green
1 sentence2021Specifically, the defendant must show that “there is a reasonable probability that, but for counsel’s unprofessional errors, the result of the proceeding would have been different.” (Internal quotation marks omitted.) People v. Domagala, 2013 IL 113688, ¶ 36 . | 1 | 2021–2021 |
People v. Kubat
green
1 sentence2020As the Court explained in Strickland, “any deficiencies in counsel's performance must be prejudicial to the defense in order to constitute ineffective assistance under the Constitution,” as “[a]n error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment.” Id. at 691–92. ¶ 37 Defendant argues that “[a]dmitting Diego’s positive GSR test could have ‘alter[ed] the entire evidentiary picture’ and potentially changed counsel’s theory of defense *** particularly because a police officer at tri | 1 | 2020–2020 |
People v. Thurman
green
1 sentence1994App. 3d 996, 1004 , 523 N.E.2d 1184 .) "An error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment.” Strickland, 466 U.S. at 691 , 80 L. | 1 | 1994–1994 |
Melrose Distillers, Inc. v. United States
green
1 sentence1987Ed. 2d 800, 802-03 , 79 S. Ct. 763, 765 , (use of term “proceeding” which includes criminal prosecutions is consistent with its normal construction); Black’s Law Dictionary 1083-85, 1099 (5th ed. 1979) (definitions of the words “proceeding,” “process” (under which “civil and criminal proceedings” are referred to), and “prosecution” (in which word “proceeding” is used)).) The point on which the parties disagree is whether the criminal proceeding at bar was “pending” at the time defendant was dissolved. | 1 | 1987–1987 |
People v. Royse
green
2 sentences1985(People v. Royse (1983), 99 Ill. 2d 163 , 457 N.E.2d 1217 .) The purpose of the sixth amendment guarantee of counsel is to ensure that a defendant has the assistance necessary to justify reliance on the outcome of the proceeding, and an error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment. {Strickland v. Washington (1984), 466 U.S. 668 , 80 L. 1985(People v. Royse (1983), 99 Ill. 2d 163 , 457 N.E.2d 1217 .) The purpose of the sixth amendment guarantee of counsel is to ensure that a defendant has the assistance necessary to justify reliance on the outcome of the proceeding, and an error by counsel, even if professionally unreasonable, does not warrant setting aside the judgment of a criminal proceeding if the error had no effect on the judgment. {Strickland v. Washington (1984), 466 U.S. 668 , 80 L. | 1 | 1985–1985 |
Northwestern University v. City of Evanston
green
2 sentences1981Although the rules of evidence are more casual in an administrative adjudication (Northwestern University v. City of Evanston (1977), 55 Ill. 1981Although the rules of evidence are more casual in an administrative adjudication ( Northwestern University v. City of Evanston (1977), 55 Ill. | 1 | 1981–1981 |
State v. Summers
green
1 sentence1979In State v. Summers, the court stated the rationale as follows: “In a criminal case it would be a denial of justice to refuse a defendant his motion to have blood tests made of a mother and her child in a proceeding where he is accused by the mother of failure to support the child and in which the question of paternity is an essential element, while at the same time granting him that right in a civil action in which paternity is an issue and the mother seeks a money judgment for non-support of an illegitimate child.” 489 S.W.2d 225, 229 . | 1 | 1979–1979 |
People Ex Rel. Mathis v. Brown
green
1 sentence1979App. 3d 783 , 358 N.E.2d 1160 ), while in a criminal proceeding the standard is proof beyond a reasonable doubt. | 1 | 1979–1979 |
City of Chicago v. Chicago Area Military Project
green
1 sentence1977Ed. 2d 483 , 95 S. Ct. 1999 , our Supreme Court held “that Rule 402 is not applicable to probation revocation proceedings.” Although Beard was a criminal proceeding the rule is applicable here. | 1 | 1977–1977 |
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.