On August 27, 1978, The Dallas Morning News published an article by Earl Golz alleging that several "counterfeit" agents of the United States Secret Service were in Dealey Plaza shortly before and after the assassination. The following day, the story was reported by the Associated Press and United Press International.
According to the report, Arnold and at least four other individuals said they met men who identified themselves as Secret Service agents. Arnold stated that he was attempting to move to the railroad bridge above the triple underpass to film the presidential limousine and motorcade when a man with a badge who said he was with the Secret Service told him that he could not be there. According to Arnold, he moved to a dirt mound in front of the picket fence on the "grassy knoll" where he filmed the motorcade as it moved down Elm Street. He described two shots as being fired over his head from behind, stating that he "hit the dirt" after feeling the first just over his left shoulder. Arnold indicated that he remained lying down for the duration of the shooting until he was confronted by two policemen who confiscated his film and ordered him to leave the area. He suggested that he had been afraid to report the incident due to claims of "peculiar" deaths of witnesses to the assassination.
According to the report, at the time of the assassination Arnold was a soldier who had just completed basic training and was reporting for duty in Fort Wainwright, Alaska two days later. In 1978, he was an investigator with the Dallas Department of Consumer Affairs. Arnold was later interviewed for the 1988 documentary The Men Who Killed Kennedy.
According to a 2013 article published in the Dallas News, in 1982, Gary Mack, the former curator of Sixth Floor Museum at Dealey Plaza, initially believed Arnold to be the Badge Man figure in Mary Moorman's polaroid photograph.
- Golz, Earl (August 27, 1978). "SS 'Imposters' Spotted by JFK Witness". The Dallas Morning News. Dallas, Texas. pp. 1A, 4A. Retrieved June 1, 2012.
- "Kennedy Site: Secret Service Stories Heard". The Victoria Advocate. Victoria, Texas. AP. August 28, 1978. p. 2A. Retrieved June 1, 2012.
- "Men Posing As Imposters Reported At Assassination". Frederick Daily Leader. Frederick, Oklahoma. UPI. August 28, 1978. p. 1. Retrieved June 1, 2012.
- "British TV documentary says mobsters killed JFK". The Bryan Times. Bryan, Ohio. UPI. October 26, 1988. p. 10. Retrieved June 2, 2012.
- Young, Michael E. (March 2, 2013). "Gary Mack and the evolution of a JFK conspiracy theorist". The Dallas Morning News. Dallas. Retrieved May 25, 2013.