In the turbulent hours following President John F. Kennedy's assassination, many were uncertain about what to do, but medical examiner Earl Rose knew one thing: The shooting happened in Dallas, and it was his job to do an autopsy on anyone slain in the city. Rose stood in a doorway at the hospital where Kennedy's body was taken on Nov. 22, 1963, in a vain attempt to block Kennedy's aides as they removed his coffin. The Secret Service and first lady Jacqueline Kennedy prevailed, and the president's body was flown to Bethesda Naval Hospital, where an autopsy was done by pathologists James Humes and Thornton Boswell. Their findings have been used to support an array of conspiracy theories about Kennedy's death. Rose, who died [on May 1] at age 85, ... told The Associated Press in 2003 that he and his staff should have done the exam. We had the routine in place to do it ... it was important for the chain of evidence to remain intact," Rose said. "That didn't happen when the body was taken to Bethesda." Rose conducted Oswald's autopsy, as well as those for Jack Ruby, the Dallas nightclub owner who killed Oswald two days after Kennedy was shot, and J.D Tippit, a police officer believed to have been killed by Oswald shortly after the assassination.