LAS VEGAS (KTNV) — It's one of the biggest mysteries in American history, and now it's the subject of a blockbuster film.
Martin Scorsese's "The Irishman" follows the story of Frank Sheeran, the notorious hitman for the Bufalino family of Philadelpia, Pennsylvania. Sheeran is one of close to a dozen people who has claimed responsibility for Hoffa's death.
"The Hoffa murder was a three-act drama with different characters in each act," said Dan Moldea, a journalist who has covered the case.
With the intrigue making headlines again, experts met at the Mob Museum in downtown Las Vegas to debunk popular myths surrounding the union leader's disappearance.
"You'll get a million different theories as to where Hoffa wound up," Moldea said while on the panel.
Hoffa was last seen on July 30, 1975, in the parking lot of the Machus Red Fox restaurant near Detroit, Michigan.
Eric Shawn interviewed Sheeran for Fox News. Sheeran told him that he and two others picked Hoffa up from that restaurant and drove him to a nearby home.
"He said he shot Hoffa with a .22 caliber in the back of the head," Shawn said.
Watch 'The Irishman' trailer below:
"He also said he sat in the passenger seat of the car that picked up Hoffa," he added, "because Hoffa liked to sit in the front seat and that was his message to Hoffa not to sit in that seat, don't get in the car."
Shawn said Sheeran told him they drove Hoffa to a home where he was killed. His body was cremated.
Shawn visited the home in 2004 and says he found blood in the basement.
"The FBI tested 50 samples and 28 were human blood." he said. "Only one showed DNA, and it was not Jimmy Hoffa. Authorities consider Frank Sheeran's story unfounded."
The film is based the book "I Heard You Paint Houses" by Sheeran's attorney, Charles Brandt.
Netflix says "The Irishman" was streamed more than 26 million times in its first week.
The film was also nominated for multiple Golden Globes including Best Director, Best Drama, and Best Supporting Actor for Al Pacinio and Joe Pesci.