David Chandler was a reporter for the New Orleans States-Item in the 1960s. Jim Garrison was the best man at his wedding in 1965. However, their friendship ended when Chandler started to realize that there was something significantly wrong with Garrison's investigation.
Here is a revealing article on Oliver Stone. This is from David Chandler's article, "The Assassin's Trail," from Westword, a Denver publication dated November 25 - December 1, 1992.
I'll be posting Chandler's complete article in the next few days along with its highlights.