According to The Officer Down Memorial Page , between 1892 and 2016 , 84 members of the Dallas Police Department died in the line of duty . The best-known instance was the murder of Officer J. D. Tippit by Lee Harvey Oswald , approximately 40 minutes after Oswald shot President John F. Kennedy on November 22 , 1963
shot President John F. Kennedy
Assassination of John F. Kennedy
Dallas Police Department