Police reports, and what to do when yours is wrong
People treat the collision report as the verdict. It is not. It is one officer's opinion, formed quickly, usually without hearing from the person who was taken away in an ambulance — and in a California civil trial, much of it is not even admissible.
What is in a California traffic collision report
- The parties, vehicles, insurance details and witnesses
- A narrative of what the officer determined happened
- A diagram of the collision
- Statements attributed to each driver and any witnesses
- Identification of the primary collision factor — the officer's view of the main cause, often with a Vehicle Code section
- Any citation issued
The primary collision factor is what people mean when they say the report blamed someone. It is an opinion based on a short investigation, physical evidence at the scene, and whoever was conscious and able to speak.
Why it carries less weight than you think
In a California civil trial, a traffic collision report is generally not admissible for the truth of its contents. It is hearsay, and the officer's conclusion about fault is usually an opinion they are not qualified to give as an accident reconstruction expert, having not witnessed the collision.
Insurance adjusters nonetheless lean on it heavily during claims handling, because it is quick and it is what they have. So the report matters a great deal in negotiation and much less in court, which is a strange and useful asymmetry.
Practically: a report blaming you is a negotiating obstacle, not a verdict. A report blaming the other driver is helpful, not conclusive.
How reports get it wrong
- Only one side was able to speak. The classic. The seriously injured person is in an ambulance, and the only account available at the scene is the other driver's.
- A witness was never interviewed, because they left before officers arrived or nobody took their details.
- Camera footage existed and was not viewed. Officers rarely canvass for footage in routine collisions.
- Transcription and coding errors — wrong direction of travel, vehicles swapped in the diagram, wrong date or time.
- An assumption did the work. A rear-end collision coded automatically against the following driver, when the lead driver reversed or cut in.
Fixing one that is wrong
You cannot generally compel an officer to change their opinion. You can get factual errors corrected and you can get your account into the file.
- Get the full report, including the diagram, any supplemental pages and any photographs taken.
- Separate fact from opinion. A wrong direction of travel is a factual error. An officer's view on who was at fault is an opinion, and a different approach is needed.
- Contact the investigating agency in writing for factual errors, setting out precisely what is wrong and what the correct detail is, with any supporting evidence. Agencies will often add a supplemental report rather than amend the original.
- Provide what the officer did not have. A witness who left, footage from a nearby business, photographs you took. New evidence sometimes leads to a supplemental report; even where it does not, it goes into the claim.
- Write your own account and date it, especially if you were not able to give one at the scene.
Questions people ask
The police report says the crash was my fault. Is my claim over?
No. A collision report records an officer's opinion formed quickly, often without hearing from the most seriously injured person, and in a California civil trial that fault opinion is generally not admissible. It is an obstacle in negotiation, not a verdict.
Can I get the police report changed?
Factual errors — wrong direction, wrong vehicle, wrong time — can often be corrected or addressed by a supplemental report if you write to the investigating agency with the correct detail and supporting evidence. An officer's opinion on fault is much harder to change, and is answered with evidence rather than argument.
No report was made. Does that hurt my claim?
It removes a convenient document; it does not remove the claim. Photographs, witnesses, medical records from the day, and the vehicles themselves all still exist. If there was injury or significant property damage, you may also have had a separate obligation to report to the DMV.
Related
Reviewed October 2026 by Simon Aziz Budhwani, Esq., the attorney responsible for this site. Legal statements here name the California code section they rely on, so you can check them rather than trust them. This is information about the law in general, not advice about your situation.
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