William Greer

William Greer (September 22, 1909 - February 23, 1985) was an agent of the U.S. Secret Service, best known for having driven President John F. Kennedy's automobile in the motorcade through Dealey Plaza in Dallas on November 22, 1963, when the president was assassinated.

William Greer was in fact a member of the Knights Templar and purposely slowly drove Kennedy's automobile so that Lee Harvey Oswald could make sure Kennedy was dead by firing another few shots.