It's been over 37 years since the mysterious disappearance of Teamster Jimmy Hoffa was being blamed on everyone from mobsters Anthony Giacalone and Anthony Provenzano to friend Charles 'Chuckie' O'Brien, Teamster Frank Sheeran and even the FBI, but the potential culprits are all dead and gone these days, so the overarching question of the greatest whodunnit in modern crime is still the location of Hoffa's discarded remains.

"The likely suspects are all known, and their motives are well documented," a TruTV documentary about the case points out. "The question is: Where? What exactly did they do to Jimmy Hoffa, and where did they dispose of his body?"

While there have been several dead leads over the years, a confession by Teamster official Sheeran, and even an urban legend about a burial at the old Giants Stadium in New Jersey — most of which led to investigations — the mystery remains unsolved.

Until now? A police team is prepping to drill outside a suburban Detroit residence in Roseville, Michigan on Friday to search for Hoffa, after an anonymous tipster revealed that he had witnessed someone buried there around the same time Hoffa disappeared in 1975, reports CNN. The alleged witness reportedly revealed nothing before this out of fear.

The location of the new proposed Hoffa burial spot lies under a concrete slab beneath a new residence, and authorities are taking samples to determine if there are human remains beneath the site. "It took us a while to get the proper equipment to do what we're going to do. If this is a person, they've been down there for 35 years. What's a few more days?" said Police Chief James Berlin.

If evidence of human remains are found from the samples, excavation will begin.

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