In Fullerton, the Fullerton Police Department is likely the law enforcement agency that would respond to a car accident on city streets. If you reported the accident to the Fullerton Police Department, their Records Bureau should have it on file. If you need a copy of the report, you can request it from them. You will need a copy of the crash report for an insurance claim or any legal action you may take.
If you have been in a car accident, it's important to be evaluated and treated by a doctor right away. Some of the local hospitals serving Fullerton where car accident injuries may be treated include Providence St. Jude Medical Center, Placentia-Linda Hospital, and Kaiser Permanente Orange County - Anaheim Medical Center.