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Teamsters Boss Jimmy Hoffa Is Still Missing

Siri Stafford/Thinkstock(ROSEVILLE, Mich.) -- Wherever Jimmy Hoffa is, he's not under a driveway in Roseville, Mich.

The mystery of what happened to the controversial Teamsters boss lives on as Roseville Police Chief James Berlin confirmed on Tuesday that no signs of human composition were found after the driveway was dug up last Friday.

Authorities were acting on a so-called "credible tip" that the remains of Hoffa, who disappeared without a trace in July 1975, might be buried on the property.

However, soil samples tested by the forensic and anthropology department at Michigan State University turned up zilch.

While most everyone assumes that Hoffa vanished under nefarious circumstances, no one has ever been accused of bumping off the powerful union leader, who was 62 when he was last seen outside the Detroit-area Machus Red Fox restaurant on July 30, 1975.

For years, it was speculated that Hoffa was buried around the end zone at the former Giants Stadium in New Jersey.

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