Published: Nov 22, 2010 11:37 PM EST
Updated: Nov 22, 2010 8:39 PM EST

FORT MYERS, Fla-- It's been 47 years since President John F. Kennedy was shot and killed in Dallas, Texas. A local man played a part in that fateful day. Jim Sibert was an FBI agent based in Maryland and was ordered to attend President Kennedy's autopsy. It's a day Sibert hasn't been able to forget.

Sibert's life changed on November 22, 1963.

"I've never had nightmares. But I can still visualize the wounds," said Sibert, "It was that bad."

Sibert and another field agent were assigned to attend President John F. Kennedy's autopsy after his assassination.

"The president-- when he was laid out there on the autopsy table-- just think of all that information that went into that brain. And here, it's all obliterated by this terrific head wound that killed him," said Sibert.

Sibert documented everything that happened in the autopsy.

"You've got a job to do and you just don't realize at the time," Sibert recalled about the experience, "I didn't realize that I was going to spend 47 years answering authors, giving depositions, taking phones calls."

For the last 47 years, Sibert has been bombarded with requests for interviews--fielding questions about what happened. Especially concerning the "single bullet" theory that a single bullet hit President Kennedy from behind, traveled through his neck, then hit Texas Governor John Connally. Connally was sitting in front of Kennedy in the car.

"I won't say that there was or was not a conspiracy, but i definitely don't accept the single bullet theory," said Sibert.

Sibert hopes that one day, history will remember him kindly.

 "This was something I didn't anticipate.  When I went into work at 7:30.  And that it was something you didn't have time to do much preparation for or anything. It was another case you were assigned to.  I did the best that I possibly could and I hope what I did would be of some influence, and be accepted," said Sibert.