Emergency!!! Help me?

My uncles very expensive car was stolen and crashed and abandoned... California Highway Patrol doesnt believe the story and theyre trying to say my uncle is lying and that he supposedly has injuries (marks etc).which is total BS!!! Please help me. My uncle is innocent i dont want to see him go yo jail for attempting insurance fraud or hit and run.

I was thinking if we sent him to the doctors is there some way in hell a doctor could prove there was no way he was in an accident recently? Ruling out trauma and confirming he has no cuts or even bruises. I dont know what to do help please.