#4 John F. Kennedy And Marilyn Monroe
It was rumored that JFK and Monroe had been having an affair before her death and that Kennedy may have told her confidential information. This slip-up caused Marilyn Monroe to lose her life, and her death was actually a murder. It has never been confirmed that President Kennedy had an affair with Monroe. There is also no evidence that he ever told her confidential information or had anything to do with her death.