Jimmy Hoffa Disappearance: Break in the Case?

Police receive tip on location of infamous teamster boss' body.
3:00 | 09/27/12

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Transcript for Jimmy Hoffa Disappearance: Break in the Case?
And now to what could be a break in a very cold case. What happened to jimmy hoch fa, the union boss who disappeared 37 years ago? There have been all kinds of rumors about where he ended up, and now, thanks to a death bed tip, this mystery might soon be solved. Abc's john donvan is on the beat. ReporOLLOWING A TIP From a dying man, police are looking at this property in roseville, michigan, at the driveway, to be specific, under which may lie the solution to a 37-year-old national mystery. What ever happened to jimmy of hoffa? And where did they dump the bold? It's all marked up. Tomorrow, they'll bring in the digger to rip it open. This is a cold case homicide. Reporter: It's always been assumed that hoffa, once a powerful president of the teamsters union, who then did jail time for bribery, was killed off by the mob, after he walked out of this detroit restaurant in july 1975. I'm going to do what I got to Reporter: It became the stuff of documentaries and movies, like 1992's "hoffa." Over the years, many theories and a few leads. An early one, that hoffa's body was entombed in concrete during the construction of giants' stadium, which was knocked down two years ago. Late going on tips, police drained an dug up a backyard pool outside of detroit. Three years later, they pulled down a barn in rural michigan. Nothing. This latest tip comes from a still anonymous source said to be dying of cancer, who says he saw a body placed here in 1975, as the driveway was being laid. Police are not sure what they'll find. If it happens to be mr. Hoffa, we'll bring an end to a major histomi mystery. Reporter: As for hoffa's dna, if any is down there, authorities pulled hairs from a hairbrush of hoffa's 11 years ago. That's the match, if it's made, that will solve the mystery of where he ended up. But still not the part about who put him there. John donvan, abc news, washington.

This transcript has been automatically generated and may not be 100% accurate.

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