Tests come back negative in Mich. search for Hoffa - Article Photos 3/4

FILE- In a Sept. 28, 2012 file photo, police tape blocks a driveway where authorities drilled for soil samples in the floor of a shed at a Roseville, Mich., Police have been told by a source that former Teamsters boss Jimmy Hoffa may be buried beneath the driveway. Like many others that came before it, the latest search for former Teamsters boss Jimmy 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, 2012 (AP Photo/Paul Sancya, FILE)