Tests come back negative in Mich. search for Hoffa - Article Photos 4/4

FILE- In a Sept. 28, 2012 file photo authorities drill for soil samples in the floor of a shed at a Roseville, Mich., home Friday, Sept. 28, 2012. Police have been told by a source that former Teamsters boss Jimmy Hoffa may be buried beneath a driveway. Like many others that came before it, the latest search for Hoffa has come up empty. Tests on soil samples gathered last week from a backyard in suburban Detroit showed no traces that Hoffa — or anyone else — was buried there, Roseville police announced Tuesday, Oct. 2. (AP Photo/Paul Sancya, FILE)