Kansas Statutes Annotated
K.S.A. § 60-420 (2026)
Evidence generally affecting credibility
✓ current as of May 2026
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60-420. Evidence generally affecting credibility. Subject to K.S.A. 60-421 and 60-422, for the purpose of impairing or supporting the credibility of a witness, any party including the party calling the witness may examine the witness and introduce extrinsic evidence concerning any conduct by him or her and any other matter relevant upon the issues of credibility.
History: L. 1963, ch. 303, 60-420; January 1, 1964.
Notes of Decisions
Cited in 74
cases (13 in the last 5 years), 1967–2026 · leading case: State v. Atkinson, 80 P.3d 1143 (Kan. 2003).
State v. Atkinson, 80 P.3d 1143 (Kan. 2003). “K.S.A. 60-420 provides: "Subject to K.S.A.”
State v. Boleyn, 303 P.3d 680 (Kan. 2013). “K.S.A. 60-420 states: “Subject to K.S.A. 60-421 and 60-422, for the purpose of impairing or supporting the credibility of a witness, any party including the party calling the witness may examine the witness and introduce extrinsic evidence concerning any conduct by him or her…”
State v. Davis, 697 P.2d 1321 (Kan. 1985). “K.S.A. 60-420 allows any party, including the party calling the witness, to introduce extrinsic evidence "concerning any conduct by him or her or any other matter relevant" for the purpose of attacking the witness's credibility.”
Khalil-Alsalaami v. State, 486 P.3d 1216 (Kan. 2021). “" K.S.A. 60-420. However, evidence of specific instances of a witness' "conduct relevant only as tending to prove a trait of his or her character, shall be inadmissible.”
State v. Ultreras, 295 P.3d 1020 (Kan. 2013). “Ultreras claims the evidence was relevant, his proposed questions were permissible under K.S.A. 60-420 as extrinsic evidence relevant to the witnesses’ credibility, and the district court erred in refusing to allow the testimony.”
State v. Martis, 83 P.3d 1216 (Kan. 2004). “K.S.A. 60-420 provides in this regard: “Subject to K.”
State v. Cosby, 169 P.3d 1128 (Kan. 2007). “2d 136 (1976) (rebuttal evidence admissible under K.S.A. 60-420 to attack defendant's credibility; evidence competent to show testimony of defendant, defense witness false).”
State v. Olsman, 473 P.3d 937 (Kan. Ct. App. 2020). “K.S.A. 60-420 generally permits the introduction of extrinsic evidence "relevant upon the issues of credibility," but evidence of specific instances of conduct are inadmissible under K.”
State v. Rice, 932 P.2d 981 (Kan. 1997). “Once Frazier denied she had seen Lindy's dead body, *580 the State contends she could be impeached by extrinsic evidence under K.S.A. 60-420. "Rebuttal evidence is that which contradicts evidence introduced by an opposing party.”
State v. Engelhardt, 119 P.3d 1148 (Kan. 2005). “This court noted that K.S.A. 60-420 permitted any party, even the party calling a witness, to introduce extrinsic evidence “concerning any conduct by [the witness] or any other matter relevant” for the purpose of attacking the witness’ credibility.”
State v. Logan, 689 P.2d 778 (Kan. 1984). “Although counsel intended to be using a reasonable defense tactic, he was operating under a misunderstanding of the law by believing the State would be able to bring out the prior convictions involving dishonesty when they cross-examined the defendant.”
State v. Frantz, 521 P.3d 1113 (Kan. 2022). “K.S.A. 60-420 generally allows any party to admit evidence relevant to the credibility of a witness: "Subject to K.”
— K.S.A. § 60-420(b) — 2 cases
State v. Deiterman, 29 P.3d 411 (Kan. 2001).
State v. Dieterman, 29 P.3d 411 (N.D. 2001).
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