Who is Jim Garrison from Case Closed: Lee Harvey Oswald and the Assassination of JFK and what is their importance?

Jim Garrison was a New Orleans district attorney who conducted an official investigation into the conspiracy aspects of the Kennedy assassination. Garrison's real name was Earling Carother Garrison, until he legally changed it to Jim. He was born in Iowa in 1921 and raised in New Orleans. He graduated from Tulane Law School in 1948 and then worked for the FBI in Seattle and Tacoma for two years. He returned to New Orleans and active duty with the National Guard but was discharged with a psychoneurosis which he claims was a misdiagnosis. Garrison worked for a private law firm before becoming assistant district attorney until 1958, when he returned to private practice. He became District Attorney in 1962. He failed to win a conviction of Clay Shaw for conspiracy to kill President Kennedy. Garrison died in 1992.