Fifty-one years after Jimmy Hoffa disappeared from a Michigan restaurant parking lot, his family has not given up hope that the case will finally be solved. In a statement to Fox News, his son, James P. Hoffa, former five-term president of the International Brotherhood of Teamsters, said the family wants accountability for what he called ahorrible crimeand hopes for closure.

Hoffa vanished on July 30, 1975, after heading to what he believed was a meeting to help him regain the Teamsters union presidency. He was last seen around 2:30 p.m. in the parking lot of the Machus Red Fox in Bloomfield Hills, Michigan, getting into a car. Law enforcement and historians have long believed that the Detroit Mafia kidnapped and killed him to stop his campaign to retake the union.

The FBI has stated that the investigation remains active, with the Detroit field office leading the efforts.The FBI has worked for five decades to investigate Jimmy Hoffa's disappearance, following every lead and carefully examining all evidence related to this investigation,the bureau said in a statement.If the public has any new, credible information regarding the disappearance of Jimmy Hoffa, the FBI will investigate.

Numerous theories have emerged over the decades. The eight-part Fox Nation documentary seriesRiddle, The Search for James R. Hoffafocuses on a dominant theory: that Hoffa was picked up at the restaurant by Detroit mob capo VitoBilly JackGiacalone, and along with mobster AnthonyTony PalPalazzolo, driven to a home owned by mobster Carlo Licata and murdered. His remains may have then been disposed of at a mob-run sanitation facility in Hamtramck, Michigan.

James P. Hoffa says he believes his father was picked up by Giacalone but will not speculate on who killed him. The documentary series reported that an informant told the FBI that Giacalone committed the murder. Such information would be recorded in FBI documents called 302s, but those records have not been made public. Detroit journalist and mob historian Scott Burnstein, who runs the websiteGangster Report,has confirmed that a 302 exists and reported that confidential informants told the FBI thatTony Palwas thedoerin the Hoffa homicide conspiracy, and that Giacaloneheaded the Hoffa hit team.

In a letter to FBI Director Kash Patel obtained by Fox News, James P. Hoffa wrote last month that it is important to the family and the country that the truth about his father's disappearance be told and that those involved, even if deceased, be exposed. He said that his father was lured to the meeting by Giacalone and his brother AnthonyTony JackGiacalone, who was considered the Detroit mob's street boss. Both brothers have since died.

Over the years, other explanations have surfaced but have not been confirmed. One claim involving Frank Sheeran, known asThe Irishman,was investigated by the Fox Nation series and found to be unfounded. Another theory that Hoffa's remains were buried in a mob-owned garbage dump in the New Jersey Meadowlands led the FBI to dig at the site in 2022, but nothing was found. Stories have also circulated that he was cremated or entombed in the Detroit Renaissance Center office complex.

New leads continue to appear. Independent investigator Roscoe Clark told Fox News that he is certain Hoffa is buried in an undisclosed location in Michigan and that forensics could help solve the cold case.A team of experts is ready to move forward because of a lack of action by law enforcement. A location has been identified within three feet,Clark said, adding that necessary locating equipment is ready to be deployed.

The FBI acknowledged receiving countless tips from the public over the decades and said it is grateful for the Hoffa family's assistance and support.We are grateful to the public, and most importantly, for the Hoffa's family assistance and support over the years,the bureau said.

Despite the mystery surrounding his disappearance, observers note that Jimmy Hoffa's legacy extends beyond his fate. His hard-fought victories at the bargaining table and on picket lines helped generations of workers achieve the American Dream — with healthcare, benefits, good pay, and retirement security. Millions of families still benefit from the labor leader's achievements. In that sense, Hoffa remains present even as his family continues to mourn.

James P. Hoffa, his sister Barbara, their children, and grandchildren somberly mark July 30 each year.It is a hard day,James Hoffa said.We always spend time with it. It is special time, a time to remember. The good thing is, that I had a great father and he did a great job in raising our family. He was a great man and we miss him.