It is certainly doubtful that Teddy would have sustained no physical evidence from being in such an accident (i.e. lack of any cuts, bruises, scrapes) so it leads one, to at least ponder, that he was not in the car when it went flying off the bridge.
The judge presiding at the" inquiry" is on the record saying at the time he didn't believe that it went down the way Teddy said it went down. That's the take home message folks. I do believe he let his political ambitions drive his decision making and not any sense of right and wrong.
It is worth a visit to the island to really have this tragedy sink in as you ponder the events of that hot July night, so many years ago.