On July 18, 1969, Senator Ted Kennedy‘s Oldsmobile careened off a 10.5-foot-wide bridge on Chappaquiddick Island in Edgartown, Massachusetts, resulting in the death of 28-year-old campaign strategist Mary Jo Kopechne. For reasons he was never able to convincingly explain, it took Kennedy 10 hours to report the accident, and he ultimately pled guilty to a misdemeanour for leaving the scene. It seemed certain the scandal would dog his career. But 11 years later, he appeared headed for the comeback of a lifetime, as frontrunner in the Democratic Party’s nomination for president in 1980. That February, Reader’s Digest commissioned reports and published a story that directly contradicted Kennedy’s sworn testimony. Written by investigative journalist John Barron, “Chappaquiddick: The Still Unanswered Questions” gained national attention. In fact, many believe our article played a major role in Kennedy’s failure to win the nomination. Fast forward to 2018, with the release of Apex Entertainment’s film Chappaquiddick, we are reminded about questions raised back then that have gone unanswered. Here are 15 puzzling facts you may not know about the Chappaquiddick tragedy.