The official investigation into the assassination of President Kennedy found that Lee Harvey Oswald acted alone. But a recent poll shows nearly 80 percent of Americans doubt that conclusion of the Warren Commission.
Retired Los Angeles police detective Mark Fuhrman, who rose to fame during the O.J. Simpson case, says he's always been fascinated by the conspiracy theories surrounding the JFK assassination so, when the opportunity presented itself, he decided to conduct his own probe and put his findings in a book.
He concluded the "lone gunman theory" was accurate and the assassination was "A Simple Act Of Murder," the title of his new book.
On The Early Show Friday, Fuhrman
So why did he decide to go that route?
"No one with any investigative background, like a detective, has given this case a thorough examination," he told CBS News, "so I decided to conduct my own investigation, which I've detailed in this book."
Fuhrman told CBS News that he went where the evidence led him, which was that Oswald "acted alone. None of the conspiracy theories really pans out. You have to look at this case as a simple murder, where the victim just happened to be the president of the United States. Too much time has been spent on proving theories that just don't hold any water. This case is just not as complicated as many people think."
"Lee Harvey Oswald, it's clear that we can connect him up at every place in this crime," Fuhrman told Smith. "He has no accountability during the assassination. He is the trigger man. His fingerprints, the gun. It goes on and on and on.
"From the point of the first shot, they are simple shots. They are easy shots. They are easy shots for an average civilian marksman, let alone somebody that was trained by the Marine Corps. …
"So it's not something that is impossible, improbable that he did it. In fact, it was quite easy.
"He almost created his own conspiracy, kind of shadow. Because he goes to all these places to try to become part of something, and everybody says, 'Get out.' They don't want any part of him."
In the book, Fuhrman examines ballistics and medical records, reviews crime scene photos and the famous Zapruder film, and takes into account the testimony of hundreds of witnesses.
The book has many photos, including autopsy photos, as well as diagrams, and drawings by Fuhrman himself.
"Anybody who writes anything on this has to take a choice in which camp they're gonna be," Fuhrman tells Smith. "If they're pro-Warren Commission, they have to sign off on the single bullet theory. If they're a conspiracy buff, then the single bullet theory is crazy, the lone gunman's crazy, everything's crazy.
"I'm kind of right in the middle. I'm kind of upsetting everybody right now."
Why include autopsy photos in the book?
"It's grisly, but it's necessary," Fuhrman says. "We live in a 'CSI' world now, where people want this information. And they want to have visuals along. I think that's one of the collapses of this investigation.
"The visual of the Zapruder film started to trump all other evidence. I find that the Zapruder film is interesting, and I think it's helpful. But it's really a piece of the worst evidence."
To read an excerpt of "A Simple Act of Murder," click here