California Evidence Code 1103 is the statute that decides when a jury in a criminal case can hear about a victim’s character. It does two very different jobs depending on the charge. In most criminal cases, subdivision (a) lets the defendant introduce evidence that the victim had a violent character or a history of violence. In sexual assault prosecutions, subdivision (c) does the opposite: it shields the victim’s sexual history from the defense except in a few carefully defined situations. Subdivision (b) ties the first use to a significant cost, because once the defense attacks the victim’s character for violence, the prosecution can turn around and put the defendant’s own violent character in front of the jury.
This matters most in self-defense cases and in sexual assault prosecutions, and the procedural rules around it can determine whether critical evidence ever reaches a jury.
Victim’s Violent Character Under Subdivision (a)
Under subdivision (a), a defendant in a criminal case can introduce evidence that the victim had a violent character or a tendency toward violence. The evidence can take any of three forms: opinion testimony from someone who knows the victim, reputation evidence about how the victim is known in the community, or evidence of specific past violent acts the victim committed.1California Legislative Information. California Code Evidence Code 1103
This is a true propensity exception. The defense is allowed to argue exactly what the general character-evidence ban in Evidence Code 1101 normally forbids: that the victim acted violently on this occasion because the victim is a violent person. That is a powerful tool, and it comes up most often in self-defense cases.2California Legislative Information. California Code Evidence Code 1101
Two Ways the Evidence Supports Self-Defense
Evidence of a victim’s violent past serves two distinct purposes, and the distinction matters because it changes what the defendant has to show.
The first use is to prove the victim was the initial aggressor. The jury hears about the victim’s violent history and draws an inference that, true to form, the victim started the fight. For this purpose, the defendant does not need to have known about the victim’s past. Even if the defendant had no idea the victim had prior assault convictions, that history is still relevant because it makes it more likely the victim threw the first punch.
The second use is to show the defendant’s fear was reasonable. If the defendant knew about the victim’s violent reputation or had personally experienced the victim’s aggression before, that knowledge helps explain why the defendant felt threatened enough to use force. Prior threats, a known history of violence, and even threats from the victim’s associates can all come in to show the defendant’s state of mind was reasonable under the circumstances. For this purpose, the defendant’s awareness of the victim’s character is the whole point.
What the Prosecution Can Do in Response
Section 1103 does not let the defense attack the victim’s character for free. Once the defendant introduces evidence that the victim was violent, two doors open for the prosecution.
First, the prosecution can present its own evidence that the victim was actually peaceful. This is a direct rebuttal, and it can take the same forms as the defense evidence: opinion, reputation, or specific instances of non-violent conduct.1California Legislative Information. California Code Evidence Code 1103
Second, and this is where the real risk lies, subdivision (b) allows the prosecution to introduce evidence of the defendant’s own character for violence. That evidence can come in through opinion testimony, reputation, or specific violent acts the defendant committed. The prosecution can then use that evidence the same way the defendant used the victim’s: to argue the defendant acted violently on this occasion because the defendant is a violent person.1California Legislative Information. California Code Evidence Code 1103
This is a calculated trade-off built into the statute. A defendant with a clean record and a victim with a documented history of violence has every reason to open this door. A defendant with their own lengthy record of violent incidents needs to think carefully, because the prosecution will put the defendant’s character right back in front of the jury.
The Rape Shield in Sexual Assault Cases
Subdivision (c) flips the direction of the statute. Instead of letting evidence in, this provision keeps it out. In prosecutions for rape, sexual battery, and related sexual offenses, the defendant cannot introduce evidence of the victim’s sexual history to argue the victim consented. All three forms of character evidence are blocked: opinion, reputation, and specific instances of sexual conduct.1California Legislative Information. California Code Evidence Code 1103
The statute also bars evidence about how the victim was dressed at the time of the offense when offered on the issue of consent. A judge can override that restriction only after finding the clothing evidence is relevant and admissible in the interests of justice, and the judge must state the reasons for that ruling on the record.1California Legislative Information. California Code Evidence Code 1103
Narrow Exceptions to the Shield
The rape shield is not absolute. A few carefully defined situations allow some sexual conduct evidence through:
- Sexual conduct between the victim and the defendant is not blocked. Prior consensual encounters between the two parties can be relevant to the consent question in a way that encounters with unrelated third parties are not.1California Legislative Information. California Code Evidence Code 1103
- If the prosecutor introduces evidence or elicits testimony about the victim’s sexual conduct, the defendant can cross-examine on that topic and offer relevant evidence specifically to rebut what the prosecution put forward.1California Legislative Information. California Code Evidence Code 1103
- Sexual conduct evidence offered to attack the victim’s credibility is not categorically barred, but it has to clear the procedural requirements of Evidence Code 782 before a judge will consider it.
The Section 782 Procedure for Credibility Evidence
When a defendant wants to introduce sexual conduct evidence to attack the victim’s credibility, Evidence Code 782 requires a specific process. The defense must file a written motion with the court and the prosecutor, accompanied by a sealed affidavit laying out the offer of proof and explaining why the evidence is relevant to credibility.3California Legislative Information. California Code Evidence Code 782
The judge reviews the sealed affidavit privately. If the offer of proof is sufficient, the judge orders a hearing outside the jury’s presence where the victim can be questioned about the proposed evidence. At the end of that hearing, the judge decides whether the evidence is relevant and whether its value outweighs the risk of unfair prejudice. If it passes both tests, the judge issues an order specifying exactly what evidence the defendant can present and what questions are permitted. The sealed affidavit stays sealed unless the defendant later raises an issue on appeal related to the offer of proof.3California Legislative Information. California Code Evidence Code 782
Skipping or botching this procedure is one of the fastest ways to get sexual conduct evidence excluded entirely, regardless of how relevant it might be.
The Judge’s Final Gatekeeping Role
Even when character evidence clears the hurdles of Section 1103, it still has to survive Evidence Code 352. That statute gives the judge general authority to exclude evidence whose value is substantially outweighed by the risk of undue prejudice, jury confusion, or wasting time.4California Legislative Information. California Code Evidence Code 352
In practice, a judge can look at otherwise admissible evidence of the victim’s violent past and decide it is too inflammatory, too remote in time, or too loosely connected to the charged offense to let the jury hear it. A victim’s bar fight from twenty years ago might technically qualify as a specific instance of violent conduct, but a judge could reasonably find that its age makes it more likely to mislead the jury than to illuminate anything useful about the current case. Trial judges have significant discretion here, and appellate courts review those decisions deferentially.
How Section 1103 Differs From Nearby Statutes
Section 1103 sits in a cluster of character-evidence statutes that are easy to confuse. A few boundary points are worth keeping straight.
Evidence Code 1102 governs character evidence about the defendant, not the victim. It lets the defendant introduce evidence of their own good character to argue they would not have committed the charged crime, and if the defendant does so, the prosecution can rebut with evidence of the defendant’s bad character. Section 1103(b)’s rule about the prosecution introducing the defendant’s violent character only kicks in after the defendant attacks the victim’s character under subdivision (a).
Evidence Code 1109 deals specifically with domestic violence cases and works very differently. In a domestic violence prosecution, the statute lets the prosecution introduce evidence that the defendant committed other acts of domestic violence as propensity evidence, meaning evidence that the defendant has a pattern of this behavior. The acts generally must have occurred within the previous ten years. The defense does not have to open the door first.
Evidence Code 1108 does something similar for sexual offenses, allowing the prosecution to introduce evidence of the defendant’s other sexual offenses as propensity evidence in a sexual assault trial. Sections 1108 and 1109 cut in the opposite direction from Section 1103(c): one shields the victim, the others expose the defendant’s own history.