I remain puzzled, completely, as to why Garrison never considered *any* role of organized crime, of elements of the mob, in the assassination. None.
There is a book about that very subject----
....the answers detailing why New Orleans District Attorney Jim Garrison and the U.S. Justice Department refused to investigate Mafia boss Carlos Marcello in connection with the assassination of President John F. Kennedy. The true story of official corruption and deception over decades where the very existence of organized crime was denied by Garrison, the city's Superintendent of Police, the Special Agent in Charge of the FBI in New Orleans, and other U.S. Justice Department officials, even though Carlos Marcello was named as a possible "conspirator" in JFK's assassination by the U.S. House Committee on Assassinations.
Falsely Accused: Jim Garrison's Investigation of JFK's Assassination and the United States of America Versus R.E. Payne : the Mafia's Influence in New Orleans

Garrison had a tiger by the tail just like JFK did. His ideas about elements of the CIA being involved... were laughed at by and large through the media. Thanks to the assistance of CIA insiders.
It was a chaotic freak show...we know it... so why does this 50 year old garbage have to get stirred up thread after thread?
I would like to know where Paul Bleau got his information-------
The CIA and Mafia’s “Cuban American Mechanism” and the JFK Assassination
Written by Paul Bleau ---------
As with many things, Jim Garrison was the first investigator to elucidate a three-sided conspiracy to assassinate President Kennedy, the three participants being the CIA, the Cuban exiles, and the Mob. He had done this unearthing during his inquiry, but he formally announced it in a famous cover story for New Orleans Magazine in 1976.
It should now seem so obvious that rogue CIA, the old Havana connected Mafia, and anti-Castro Cuban mercenaries were involved but...I can't find that interview.