Career
Files has subsequently been interviewed by others and discussed in various books pertaining to the assassination and related theories. In 1994, the Federal Bureau of Investigation was quoted as having investigated Files" allegation and found it "not to be credible". In 2010, Playboy magazine published an article by Hillel Levin in which Files also implicated Charles Nicoletti and John Roselli in the assassination of Files has stated that he was born in Alabama, moved to California with his family shortly thereafter, then to an Italian neighborhood in Chicago.
Files was convicted of the attempted murder of two police officers during a roadside shootout in 1991 and sentenced to fifty years.
An "anonymous Federal Bureau of Investigation source", later identified as Zack Shelton, has been reported by some researchers as having told Joe West, a private investigator in Houston, in the early 1990s about an inmate in an Illinois penitentiary who might have information about the Kennedy assassination. On August 17, 1992, West interviewed Files at Stateville Correctional Center in Crest Hill, Illinois.
According to Bugliosi, very few within the community of people who believe there was a conspiracy to kill Kennedy respect him or his story. Conspiracy author Jerome Kroth described Files as "surprisingly credible" and said his story "is the most believable and persuasive" about the assassination.