California Evidence Code section 352 lets a trial judge keep otherwise relevant evidence out of a case when the danger of unfair prejudice, confusion, or wasted time substantially outweighs what the evidence actually proves.1California Legislative Information. California Evidence Code 352 That one word, “substantially,” does most of the work. The rule is deliberately tilted toward admitting evidence; a judge can only block it when the dangers clearly and heavily outweigh its value.
What the Statute Says
Section 352 reads simply. A court may exclude evidence when the probability that admitting it will create a substantial danger of undue prejudice, confuse the issues, mislead the jury, or consume undue time substantially outweighs its probative value.2California Legislative Information. California Code Evidence Code 352 It applies in both civil and criminal cases, from personal injury suits to murder trials.
Two features matter. The word “may” means exclusion is never mandatory; even dangerously prejudicial evidence can come in if the judge decides it should. And “substantially outweighed” sets a high bar for keeping evidence out. Evidence that is somewhat prejudicial but genuinely helpful in proving a disputed fact will almost always be admitted. The scale is weighted toward admission.
What “Undue Prejudice” Actually Means
People hear “prejudice” and assume it means evidence that hurts one side. That isn’t what section 352 targets. All useful evidence hurts somebody; that’s the point of offering it. The prejudice the statute guards against is a specific kind: evidence that tempts the jury to decide the case on an emotional or irrational basis rather than on the facts.
Prior criminal convictions are the classic example. In a robbery trial, the prosecution might want to tell the jury the defendant was previously convicted of unrelated drug charges. That evidence might chip away at the defendant’s credibility, but the bigger risk is that jurors hear “prior convictions” and start thinking the defendant is simply a criminal who probably committed this robbery too. The evidence doesn’t prove the robbery; it just makes the defendant look bad. That emotional shortcut is exactly what the statute exists to prevent.
Graphic crime scene photographs raise the same concern. Images showing a victim’s injuries can be critical for proving cause of death, but when they’re unnecessarily gory and medical testimony could establish the same facts, their main effect is to inflame the jury rather than clarify the issues. The judge weighs whether the photographs add something the jury genuinely needs against the risk that jurors will be too horrified to evaluate the evidence calmly.
Evidence That Typically Draws a 352 Fight
Some categories of evidence attract 352 objections far more often than others:
- Prior bad acts and criminal history. California generally bars character evidence offered only to show someone “acted in character,” and even when such evidence is admissible for another purpose, it still has to survive a 352 balancing test.3California Legislative Information. California Evidence Code 1101
- Graphic photographs and videos. Autopsy photos, accident scene images, and violent surveillance footage often draw objections. The question is rarely whether the images are relevant but whether less shocking alternatives would convey the same information.
- Evidence of insurance coverage. Telling a civil jury that a defendant carries liability insurance can lead jurors to inflate damages on the assumption that “the insurance company is paying anyway.” This is typically excluded.
- Expert testimony on tangential issues. When an expert’s testimony drifts into territory only loosely connected to the case, the time and confusion can outweigh its usefulness.
- Cumulative evidence. When one side keeps calling witnesses to say what has already been established, a judge can shut it down as a waste of trial time.
How 352 Interacts With the Character-Evidence Rule
Section 352 doesn’t operate alone. It is an additional filter layered on top of California’s other admissibility rules, and evidence that passes through one gate can still be stopped at 352’s door.
The most important interaction is with Evidence Code 1101, which governs character evidence and prior bad acts. Section 1101(a) generally prohibits using someone’s past behavior to prove they acted the same way on a particular occasion. Section 1101(b) carves out exceptions: prior acts can come in to prove motive, intent, identity, a common plan, or absence of mistake.3California Legislative Information. California Evidence Code 1101 But even when prior acts fit an exception, California courts have held that the evidence must still pass 352 balancing before the jury hears it. The judge weighs how important the evidence is to proving the disputed fact, how strong the link is between the prior act and the current charge, how remote in time the prior act was, and whether less prejudicial alternatives exist.
This is where many attorneys lose evidentiary battles. They clear the relevance and exception hurdles, then get blindsided by 352.
How to Raise a 352 Objection
A party who wants evidence excluded under 352 has two main procedural paths: filing a motion in limine before trial, or making a contemporaneous objection when the evidence is offered during trial.
A motion in limine is filed before trial begins and argued outside the jury’s presence. This is often the better option for evidence whose mere mention could taint the jury’s thinking. If the judge grants the motion, the jury never learns the evidence exists, which eliminates the risk that jurors can’t “un-hear” something once it’s been said in open court. Timing varies by judge and local court rules, but these motions are typically filed in the weeks leading up to trial.
The alternative is objecting in real time during testimony or when an exhibit is offered. This works for evidence a party didn’t anticipate or that only becomes problematic in context. The downside is obvious: even if the judge sustains the objection and tells the jury to disregard what they just heard, the damage may already be done. For genuinely inflammatory evidence, a pretrial motion is almost always the smarter play.
Either way, the objecting party carries the burden. Because 352 presumes evidence should come in, the lawyer has to articulate specifically why the prejudice, confusion, or time consumption substantially outweighs the evidence’s probative value. A vague objection that evidence “is prejudicial” won’t cut it.
How Much Latitude the Judge Has
The word “discretion” in the statute gives trial judges wide room to make judgment calls, and California appellate courts generally defer. Two judges looking at the same evidence in the same type of case might reasonably reach different conclusions, and neither would necessarily be wrong. The judge in the courtroom has a feel for the jury, the tone of the trial, and the relative importance of each piece of evidence that no written record can fully capture.
Discretion still has limits. A judge who excludes critical evidence without meaningful analysis, or who admits shocking material without weighing its impact, risks reversal. The key constraint is that the balancing has to actually happen. A ruling that simply states the evidence is excluded, without engaging the competing considerations, is more vulnerable than one showing the judge weighed probative value against specific prejudice concerns.
Appealing a 352 Ruling
When a party believes the judge got the 352 analysis wrong, the path to relief runs through the appellate courts, and it’s a narrow one. Appellate review of 352 rulings uses the “abuse of discretion” standard, which is deliberately hard for the challenging party to meet.4Legal Information Institute. Abuse of Discretion An appellate court won’t substitute its own judgment for the trial judge’s. It asks a narrower question: did the trial court’s decision fall outside the bounds of reason? If reasonable minds could differ, the ruling stands.
Even when an appellate court finds an error, that doesn’t automatically produce a new trial. Under the harmless error doctrine, mistakes in admitting or excluding evidence are disregarded unless they affected a party’s substantial rights.5Legal Information Institute. Rule 61 Harmless Error In California, the standard for most 352 errors asks whether there’s a reasonable probability the outcome would have been different without the mistake. That’s a high hurdle, and many successful challenges to individual evidentiary rulings still don’t result in a reversal.
Preserving the right to appeal requires objecting clearly at trial and stating the specific grounds. A general objection that doesn’t reference prejudice, confusion, or time consumption may not be enough to raise the issue later. Appellate courts work from the transcript, not from what the lawyer wishes they had said.
A Note on the Federal Version
Section 352 is California’s state-court rule. In federal court, the counterpart is Federal Rule of Evidence 403, which uses similar “substantially outweighed” language and reaches similar results, though the phrasing differs in places.6Legal Information Institute. Rule 403 Excluding Relevant Evidence for Prejudice Confusion If your case is in federal court, Rule 403 governs, not section 352.