I read years ago Mary Jo was pregnant with Teds child, and that the real conspiracy here was, Mary Jo revealed that to Ted that week. Ted may have killed her to hide that fact
Yep, could be. There are many unexplained things about what happened. She may well have been pregnant.
The party at Chappaquiddick was a bit strange. Six men, many if not all married, were partying with six single women.
The Kennedys cleaned out the rented house where the party was held, and evacuated everyone off the island before law enforcement could talk to anyone. I think many if not all the girls there were campaign workers or somehow involved in politics and lived mostly in the Washington area. They were spirited away from Chappaquiddick before any contact with the investigation into the death of Mary Jo.
The house was cleaned up, with all evidence of alcohol or anything else removed and disposed of.
Clearly there was a cover up going on there.
Seems like a pretty messy way to kill someone, but who knows?
Nothing would surprise me.