Any legal measures to demand an errounous police-report of a car accident to be changed?

You can request a correction or supplement to a police report, but you generally can’t force the officer or department to change it. In California, police reports reflect the officer’s opinion at the time of the crash, and they are not legally binding when determining fault in insurance claims or lawsuits. If you have dash-cam video that clearly shows what happened, you should provide a copy to the investigating agency and ask that it be added to the case file as supplemental evidence. You can also submit a written statement or “counter-report” explaining the errors and including your supporting evidence. Even if the officer doesn’t amend the report, you can use your video and statement to challenge fault with your insurance company or, if needed, in court. Insurers and judges rely on evidence, not just the report’s conclusions. If the accident involves significant damages or potential liability, a California personal injury attorney can help present your video evidence effectively and, if necessary, dispute the officer’s findings through proper legal channels.