James Carothers Garrison ( born Earling Carothers Garrison ; November 20 , 1921 – October 21 , 1992 ) was the District Attorney of Orleans Parish , Louisiana , from 1962 to 1973 . A member of the Democratic Party , he is best known for his investigations into the assassination of President John F. Kennedy . He was portrayed by Kevin Costner in Oliver Stone 's '' JFK '' , while Garrison himself portrayed Earl Warren
assassination of President John F. Kennedy
Assassination of John F. Kennedy
Jim Garrison