Phillip A. Twombly was Executive Vice President of Coca Cola for their Caribbean operations. Later he owned a bank in Fullerton, California. According to Chauncey Holt this bank was used to distribute CIA funds for covert operations.
In 1963 Holt received instructions from Twombly to provide false ID documents for Lee Harvey Oswald. These documents (in the names of Lee Harvey Oswald and Alek Hiddell) were delivered by a man called George Reynolds. In August, 1963, Twombly asked Holt to travel to New Orleans, where he met Oswald and Carlos Bringuier.
Chauncey Holt later claimed he was went to Dallas in November, 1963, with Charlie Nicoletti, James Canty and Leo Moceri. In Dallas he passed on forged documents and guns (with silencers) to Charles Harrelson and Charles Rogers (Richard Montoya). Holt was told that "an incident was going to be created which could be laid at the door of pro-Castro Cubans. The word attempted assassination was never used. We assumed that from all this light loaded ammunition that maybe somebody was going to try to take a shot from somewhere, probably the Dal-Tex building, or one of the buildings around there. But at no time was it ever intimidated to us that an assassination or attempted assassination on Kennedy."
When the Kennedy motorcade reached the Dealey Plaza Holt was in the parking lot behind the Grassy Knoll. After the shooting took place Holt went to hide in a railroad car. He was joined by Charles Harrelson and Charles Rogers. However, soon afterwards, Dallas police officers entered the railroad car and arrested all three men. The three men along with Jim Brading were interviewed by Gordon Shanklin of the FBI and then released.
In October, 1991, Holt confessed to John Craig, Phillip Rogers and Gary Shaw about his role in the assassination of John F. Kennedy. Holt's story was undermined in 1992 when the Dallas Police Department revealed that the three tramps were Gus Abrams, John F. Gedney and Harold Doyle. Ray and Mary LaFontaine carried out their own research into this claim. They traced Doyle and Gedley who confirmed they were two of the tramps in the photograph. Gus Abrams was dead but his sister identified him as the third tramp in the photograph.