Tell HN: Tesla rear-ended me on autopilot, no one will investigate
This is still a local thing.  The Feds don't have jurisdiction.You need to either 1) file a police report and an insurance claim, and let things play out, or 2) hire a lawyer.   In either case, the Tesla has excellent dash cam video and flight-recorder black box data which can be subpoenaed/demanded.Beyond that, you have no other options.  Certainly not the NTSB or NHTSA.