President Nixon had been in office nearly seven months at the time of the Chappaquiddick accident but he viewed Ted Kennedy as a potential threat to his political future. So he sent his private investigator to dig up some dirt, a man who may have known more about Chappaquiddick that anyone else. Learn about his secret investigation and hear from one of the the Senator’s closest confidantes, whom he called in the early morning hours after the accident. To continue the discussion, join our Facebook group to share your thoughts and theories or reach us directly at [email protected]. And for more on the case, go to people.com/coverup.Learn more about your ad choices. Visit megaphone.fm/adchoices