As chief investigator for the Jack Ruby defense team from December 1963 to March 1964, Denson interviewed more than 100 acquaintances of Ruby. Denson was heavily involved with defense preparations and sat behind Ruby during the course of the trial. Shortly after the trial, Denson wrote the book Destiny in Dallas (1964). Recorded April 24, 2008.
Mr. Denson passed away on December 18, 2010.