Does a police report decide who was at fault?
Reviewed by Andrew (Andy) R. Gillin
California State Bar #45226 ↗ · Approval recorded November 4, 2026
How we record review approvalA police report can help explain a crash. It does not decide the whole injury claim. An insurer or court may look at other proof too.
In this guide
Here’s an example
A report repeats one driver’s story. Later, a video shows a different light signal.
A made-up example to explain the idea. Your facts may lead to a different answer.How the rule works
A report may mix facts the officer saw with things other people said. Those parts do not all have the same role. Other proof can fill gaps or show errors.
Legal references: [1] CACI No. 400–401 — Negligence and the standard of care (2026 edition) · [2] California Courts — Civil lawsuits · [6] Vehicle Code § 20013 — Accident reports in evidence
What can change the answer?
An insurer may read a report even if all of it cannot be used in court. Those are separate issues.
Questions people ask
Court decisions behind this answer
A case can help explain a rule. Its facts and limits matter too.
Box v. California Date Growers Assn.
California Court of Appeal · 1976
57 Cal.App.3d 266, pp. 270–271
The court kept the police report and its diagram out of the crash trial. It applied rules about what proof the court could use.
This does not decide the use of every separate observation or witness account. Check the rules for the type of proof.
Case applicability reviewed as recorded above.
A useful next step
Get the report and note any factual errors. Save your own photos and witness details too.
If you are unsure which rule applies, a lawyer can review your facts and any deadlines. Learn about GJEL’s injury representation.
The law behind this guide
The references below support the legal discussion. Their application depends on the facts.
- CACI No. 400–401 — Negligence and the standard of care (2026 edition) ↗Jury instructions · Review recorded above
- California Courts — Civil lawsuits ↗Court guidance · Review recorded above
- Box v. California Date Growers Assn. (1976) 57 Cal.App.3d 266 ↗Case law · Review recorded above
- California Department of Insurance — Automobile insurance guide ↗Agency guidance · Review recorded above
- Code of Civil Procedure § 335.1 — Injury and death actions ↗Statute · Review recorded above
- Vehicle Code § 20013 — Accident reports in evidence ↗Statute · Review recorded above
Updated 2026-11-04. Read our editorial standards.