No offense intended, but has your reading included any book that supports the official version of what happend in Dallas? Or have you limited yourself only to conspiracy books? There are two very good books I'd recommend: "Case Closed," by Gerald Posner and "Reclaiming History" by Vince Bugliosi.
What people get when they come forward decades later is attention, free meals, hotel rooms, plane rides, TV interviews and support from the conspiracy theorists. For many years after the assassination, Jean Hill (who was prominently featured in Oliver Stone's work of fiction) used to pass out business cards identifying herself as "the witness closest to the shooting." And until the day she died, she was an honored guest at conspiracy conventions. She was standing next to her friend, Mary Mooreman, who took the famous polaroid in which people with extremely vivid imaginations claim to see "badge man."
In the Hisotry Channel series "The Men Who Killed Kennedy," (which concluded it was Corsican drug dealers!) a guy by the name of Gordon Arnold came forward claiming to have been on the grassy knoll, in his Army uniform, and a shot passed directly over this head. Trouble is, none of the countless photos of the grassy knoll that day show anybody in an Army uniform. The standards of proof for people who offer these kinds of claims are non-existant. But they always receive a warm reception in some quarters (see previous paragraph)
The inference of subjective motivation from objective result is the dark heart of any conspiracy theory. I would just respectfully suggest broadening your horizons a bit to include opposing views. IMO, this latest Pepper side show amounts to nothing and will result in nothing.