§ 4-4. Character Evidence Not Admissible to Prove Conduct; Exceptions; Methods of Proof; Cross-Examination of a Character Witness
4-4. Character Evidence Not Admissible to Prove Conduct; Exceptions; Methods of Proof; Cross-Examination of a Character Witness
(a) Character evidence generally. Evidence of a trait of character of a person is inadmissible for the purpose of proving that the person acted in conformity with the character trait on a particular occasion, except that the following is admissible:
(1) Character of the accused. Evidence of a specific trait of character of the accused relevant to an element of the crime charged offered by an accused, or by the prosecution to rebut such evidence introduced by the accused.
(2) Character of the victim in a homicide or criminal assault case. Evidence offered by an accused in a homicide or criminal assault case, after laying a foundation that the accused acted in self-defense, of the violent character of the victim to prove that the victim was the aggressor, or by the prosecution to rebut such evidence introduced by the accused.
(3) Character of a witness for truthfulness or untruthfulness. Evidence of the character of a witness for truthfulness or untruthfulness to impeach or support the credibility of the witness.
(b) Methods of proof. In all cases in which evidence of a trait of character of a person is admissible to prove that the person acted in conformity with the character trait, proof may be made by testimony as to reputation or in the form of an opinion. In cases in which the accused in a homicide or criminal assault case may introduce evidence of the violent character of the victim, the victim's character may also be proved by evidence of the victim's conviction of a crime of violence.
(c) Specific instances of conduct on cross-examination of a character witness. A character witness may be asked, in good faith, on cross-examination about specific instances of conduct relevant to the trait of character to which the witness testified to test the basis of the witness' opinion.