[Thirteen] days before that dark day in Dallas, [police informant Willie Augustus] Somersett elicited a chilling, police tape-recorded threat from a right-wing racist who talked of how the President would soon be shot from an office building with a high-powered rifle" and how "they'll pick up somebody within hours afterjust to throw the public off." Extremist Joseph A. Milteer, of Quitman, Ga., made the threat against Kennedy in the kitchen of Somersett's small apartment in downtown Miami. In the late 1970s, the House Assassinations Committee had experts analyze a photograph taken in Dealey Plaza moments before the first shot of an unidentified motorcade spectator "who bears a strong resemblance" to Milteer. The experts, however, concluded the man was not Milteer, who died in 1974. But now, a retired FBI agent who says that within hours of the assassination he was assigned to locate Milteer has [said] the man in the photograph is indeed Milteer. "I stood next to the man. I interviewed him and spent hours with him," said Don Adams, who spent 20 years with the FBI before working as a police chief in Ohio. "There is no question in my mind. As soon as I saw that picture I almost fell off of my feet." Congressional investigators never contacted Adams. Adams, now 82, says he saw the Dealey Plaza photograph for the first time a decade after his 1982 retirement from the FBI. The photograph renewed his interest in the case and ultimately led him to write the book, From an Office Building with a High-Powered Rifle. His insider's account raises disturbing questions about the FBI's investigation of Kennedy's death.