J. D. Tippit answer questions surrounding the events. President Johnson also hoped to quell rumors that arose after Oswald was shot by Jack Ruby that the assassination and subsequent shootings were part of a conspiracy. The committee, known as the Warren Commission (named for the commission chairman, Chief Justice Earl Warren), spent ten months investigating the murders and interviewing witnesses. On September 24, 1964, the Warren Commission released an 888-page report that concluded there was no evidence of a conspiracy and Lee Harvey Oswald acted alone in killing President Kennedy and Officer Tippit. The report also concluded that Jack Ruby acted alone in
John F. Kennedy assassination conspiracy theories Kennedy and others. Historian Michael L. Kurtz wrote that there is no evidence suggesting that Johnson ordered the assassination of Kennedy. According to Kurtz, Johnson believed Fidel Castro was responsible for the assassination and that Johnson covered up the truth because he feared the possibility that retaliatory measures against Cuba might escalate to nuclear war with the Soviet Union. In 2012, biographer Robert Caro published his fourth volume on Johnson's career, "The Passage of Power", which chronicles Johnson's communications and actions as Vice President, and describes the events leading up to the assassination. Caro wrote that "nothing that I have