FBI searched under New Jersey Bridge for Jimmy Hoffa’s remains last month

The Mystery of Jimmy Hoffa – Nearly 40 years after his disappearance, former Teamsters boss Jimmy Hoffa, pictured circa 1955, remains among America’s most famous missing people. Authorities have been searching for the once powerful union boss since he disappeared in 1975.

The Mystery of Jimmy Hoffa – Hoffa relaxes in a chair at the Teamsters union office. He was one of the most powerful union leaders in America until he was forced out of the organized labor movement. He went to prison in 1967 for jury tampering and fraud before being pardoned four years later.

The Mystery of Jimmy Hoffa – Hoffa appeared at the 1957 Teamsters union convention, his first year as union president.

The Mystery of Jimmy Hoffa – Hoffa, center, stands with other officials at the Teamsters convention, where he successfully bid for control of the union in 1957.

The Mystery of Jimmy Hoffa – Hoffa testified at a Senate Racquet Committee hearing in 1958.

The Mystery of Jimmy Hoffa – Hoffa talking on the phone at the airport in 1959.

The Mystery of Jimmy Hoffa – An office for the local branches of the Teamsters union that Hoffa founded.

The Mystery of Jimmy Hoffa – Hoffa dines with union leader Joseph Curran, left, in 1959.

The Mystery of Jimmy Hoffa – Hoffa organizes a Teamsters rally at Madison Square Garden in New York in 1960.

The Mystery of Jimmy Hoffa – Hoffa leads supporters at a Teamsters conference in 1959.

The Mystery of Jimmy Hoffa – The boss of Teamsters appeared on the cover of Life magazine on May 18, 1959. The headline read, “National Threat: Hoffa’s Team; Part 1: The Origin of Undisturbed Power mix of an Alliance.”

The Mystery of Jimmy Hoffa – Hoffa, pictured circa 1960, was a powerful labor leader at a time when unions had a lot of influence in elections and were notoriously linked to organized crime.

The Mystery of Jimmy Hoffa – From left, “Meet the Press” moderators Ned Brooks, Lawrence K. Spivak and Hoffa appear at an NBC studio.

The Mystery of Jimmy Hoffa – Hoffa and his son, James Phillip, walk into a federal courtroom in July 1964. His son is the current president of Teamsters.

The Mystery of Jimmy Hoffa – Hoffa, second row, center, leaves court after being found guilty of tampering with a jury in 1964.

The Mystery of Jimmy Hoffa – Hoffa at Pittsburgh airport in 1971 on his way back to federal prison after being released to visit his ailing wife. He was released from prison later that year on condition that he not resume union activities before 1980.

The Mystery of Jimmy Hoffa – Hoffa took a photo on July 24, 1975, less than a week before going missing. He was 62 years old at that time.

The Mystery of Jimmy Hoffa – A police officer in Bloomfield Township, Michigan, stands next to Hoffa’s car after the former labor leader went missing in July 1975. Hoffa was last seen at a restaurant in suburban Detroit on May 30. 7 year 1975.

The Mystery of Jimmy Hoffa – Police sweep a field in Waterford Township, Michigan, looking for Hoffa’s body in July 1975.

The Mystery of Jimmy Hoffa – FBI agents search the scene for Hoffa’s remains on Monday, June 17, 2013, in Oakland Township, Michigan, a suburb of Detroit. The alleged gunman, Tony Zerilli, tipped off police, and a source close to the case said the information provided was “very credible.”