 Files was initially imprisoned at Stateville Correctional Center in Crest Hill, Illinois before being transferred to Danville Correctional Center in Danville, Illinois.Files was paroled in May 2016.An "anonymous FBI 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.