Character Evidence in California: Rules, Exceptions, and Courtroom Applications

Character evidence can influence how a judge or jury views a person, but California courts generally limit its use to prove that someone acted consistently with a particular trait on a specific occasion. The rules differ depending on the purpose of the evidence, whether the case is criminal or civil, and whether a statutory exception applies. Understanding California character evidence rules—including Evidence Code sections 1101, 1102, 1103, 1108, and 1109—helps explain when past conduct or reputation may be considered and when it must be excluded.

Sexual offense evidence under Section 1108

Evidence Code section 1108 creates a specific exception in criminal cases involving a defendant accused of a sexual offense. Subject to other laws and the court’s discretion, evidence that the defendant committed another qualifying sexual offense may be admissible to show a propensity to commit such offenses. This is a notable exception to section 1101’s general ban on propensity reasoning.

Section 1108 does not make every allegation or past act automatically admissible. The court must assess whether the evidence qualifies under the statute and whether it should be excluded under Evidence Code section 352. In People v. Falsetta (1999), the California Supreme Court upheld section 1108 and explained that section 352 provides an important safeguard against evidence whose prejudicial effect substantially outweighs its probative value.

Domestic violence evidence under Section 1109

Evidence Code section 1109 creates a similar, limited propensity exception for specified criminal cases involving domestic violence. When the statute applies, evidence of a defendant’s other qualifying acts of domestic violence may be admitted to support an inference that the defendant acted consistently with that behavior. The court still evaluates the evidence under section 352 and any other applicable restrictions.

Sections 1108 and 1109 are exceptions created by statute, not general permission to use prior misconduct in every criminal prosecution. Whether a prior act qualifies, how it can be proved, and whether its admission would be unfairly prejudicial depend on the specific record and legal requirements.

Evidence Code Section 352: The Prejudice Check

Even relevant evidence can be excluded. Under Evidence Code section 352, a judge may exclude evidence when its probative value is substantially outweighed by the probability that it will create a substantial danger of undue prejudice, confuse the issues, mislead the jury, or consume an undue amount of time. This balancing rule applies broadly, including to evidence offered under section 1101(b) and the statutory exceptions in sections 1108 and 1109.

“Prejudice” in this context does not simply mean that evidence hurts a party’s case. The concern is that jurors may give evidence an improper or excessive effect—for example, treating a past accusation as proof of guilt without carefully evaluating the charged conduct. Courts may consider how similar the acts are, how reliable and remote the evidence is, how much time would be needed to litigate it, and whether a limiting instruction can reduce the risk of misuse.

For section 1108 evidence, section 1108 itself directs the court to section 352. Section 1109 also incorporates that balancing safeguard. As Falsetta illustrates, a statutory propensity exception does not remove the trial judge’s responsibility to evaluate fairness and relevance in the circumstances of the particular case.

Character Evidence in Civil Cases

California civil cases generally follow the section 1101(a) rule against using character to prove conduct on a specific occasion. A party typically cannot argue that another person behaved wrongly in a lawsuit simply because that person has a reputation for dishonesty or misconduct. Evidence may still be admissible for a proper noncharacter purpose, subject to relevance and section 352.

There are specific rules for character evidence offered to impeach a witness’s credibility. Evidence Code section 787 generally bars attacking or supporting a witness’s credibility in a civil action with evidence of the witness’s character, except as provided by law. Section 788, for example, addresses impeachment with a felony conviction, subject to applicable legal limits. The distinction matters: evidence about whether a witness is believable is not the same as evidence offered to prove a party acted in conformity with a trait.

Section 1105 separately addresses evidence of a person’s habit or custom. Habit evidence can describe a regular, specific response to a repeated situation, rather than a broad personality trait. For example, proof of a consistent routine may be relevant to whether a person followed that routine on a particular occasion. Courts distinguish a sufficiently regular practice from a general claim that someone is careful, careless, or usually acts a certain way.

How Courts Evaluate Prior-Act Evidence

When a party seeks to introduce character or prior-act evidence, the court usually considers the purpose, the legal basis, and the potential effect on the trial. The following questions often shape the analysis:

• What fact is the evidence offered to prove? A clear, relevant purpose is necessary; a disguised propensity argument may be excluded.
• Does a statute permit the evidence? Sections 1102, 1103, 1108, and 1109 apply in defined circumstances, not across all cases.
• Is the evidence reliable and sufficiently connected? Similarity, remoteness, and the quality of proof may affect its usefulness.
• Does section 352 favor exclusion? The court weighs probative value against risks such as undue prejudice, confusion, and wasted time.
• Can a limiting instruction help? A judge may instruct jurors to consider evidence only for a permitted purpose, where appropriate.

Parties commonly raise these issues before trial through motions in limine, which ask the judge to rule on proposed evidence in advance. The court may also revisit a ruling as the evidence develops. A pretrial decision does not always resolve every question about how the evidence may be used during testimony or in closing arguments.

Practical Examples of the Rules

Key California Statutes and Case Law

The central provisions include California Evidence Code section 1101, governing character evidence and other-act evidence; section 1102, covering a criminal defendant’s character evidence; section 1103, addressing specified victim and defendant character evidence; and section 352, providing the general balancing test.

For the statutory propensity exceptions, see section 1108 on qualifying sexual-offense cases and section 1109 on specified domestic-violence cases. People v. Falsetta, 21 Cal.4th 903 (1999), is a leading California Supreme Court decision on section 1108 and the role of section 352.

Character evidence rulings can turn on small differences in the purpose, context, and reliability of proposed proof. The statutes provide the framework, but a judge applies them to the evidence and issues in the individual case. This article offers general legal information, not legal advice; current statutes and case law should be checked for any specific matter.