Conspiracy theorists claim that John F. Kennedy's plane crash

2. Conspiracy theorists claim that John F. Kennedy's plane crash wasn't an accident, allegedly, according to them, he was murdered by an alleged bomb planted on his single engine Piper aircraft.

Allegedly, new eyewitness information says there was an explosion in the sky shortly after 9:30 p.m. when Kennedy was reportedly approaching the Vineyard airport from over the ocean.

Victor Pribanic, a lawyer from White Oak, Pa., was fishing off the Massachusetts island's south end as JFK, Jr. made his approach.

"I heard a loud impact like a bomb," says Pribanic.

The next day, he went with Hank Myer of West Tisbury Police to spot where he'd been fishing and pointed to where he heard the explosion in the sky.

"Where Victor Pribanic had pointed as the location of the explosion is exactly where the Coast Guard recovered scattered items from the blown-up plane and near where other debris from the plane had washed ashore."

According to Pribanic, officials never interviewed him.

Allegedly, a reporter for the Vineyard Gazette told a TV station that he was out walking at the time of the crash and saw a "big white flash in the sky," off Philbin Beach."

Mysteriously, the reporter has seemingly vanished without a trace and information about him was stonewalled.

Several weeks later, a blogger called the newspaper to ask for the reporter and a woman there said: "Oh, no, we can't do that." When the blogger asked for the man's name, the woman replied: "No, we can't do that either," adding that "he no longer works for us, he went back to school." When the blogger mentioned to the woman that the reporter had witnessed an explosion in the sky," she replied: "Well, they were shooting rockets up in the air, or something like that."