A new documentary examining the assassination of President John F. Kennedy claims that there was a second shooter involved, a Secret Service agent whose gun went off by accident, reports the Daily Mail.

This November will be the 50th anniversary of Kennedy's assassination. The documentary, "JFK: The Smoking Gun," will air on the Reelz Channel on Nov. 3. Colin McLaren spent four years investigating the assassination building his case off of the previous research by Howard Donahue. Donahue spent twenty years examining the infamous shooting and was the subject of "Mortal Error: The Shot That Killed JFK," according to the Huffington Post.

The documentary makes the argument that George Hickey, a Secret Service agent who was travelling in the car trailing Kennedy, accidently discharged his AR-15 assault rifle and delivered the fatal shot to the back of Kennedy's head when the car came to a sudden stop after Oswald's first shot, according to the Huffington Post.

"It was his first time in the follow car, his first time holding the assault weapon he was using," McLaren said at a press event on Sunday.

The main argument that the documentary makes for there being a second shooter is that they believe that one of the bullets that struck Kennedy was a hollow point round and that Oswald's gun was not using hollow point bullets.

The filmmakers believe that the government acted swiftly with the help of Robert Kennedy to cover up Hickey's involvement in order to save the Secret Service from embarrassment. In a witness statement Hickey said that he had stood up and cocked his weapon but that he did not fire, according to the Daily Mail.

"We're not saying this was intentional," the author of "Mortal Error" Bonar Menninger said at the press conference. "This was a tragic accident in the heat of the moment. We don't suggest he was in any way involved in a conspiracy."

While the theory that Hickey accidently shot Kennedy was written about by Donahue many years ago the filmmakers argue that they have been able to further the theory thanks to documents that were made public in the 1990's, according to the Huffington Post.

"Our documentary is going to be the only one that has opened the case forensically and looked at the evidence from the beginning and examined everything that happened that day in Dealey Plaza," the film's executive director, Michael Prupas, said.