From 1988 to 1990, Williams was a staff writer for the music industry trade magazine Cashbox in Los Angeles, California.
He is credited with being the first national critic to write about the band The Posies, who were signed to Geffen Records after Williams' review of the album Failure.
In 2013, Williams published The Grassy Knoll Report, culminating his 30 years of research into the assassination of President John F. Kennedy.
[11] Williams served as a juror, panelist and adjunct host for the annual St. Louis International Film Festival.
On November 22, 2013, Williams and the festival hosted director Oliver Stone for a 50th anniversary discussion of the Kennedy assassination.