Authorities are drilling into a concrete floor of a shed in suburban Detroit to determine if it covers the final resting place of Teamsters boss Jimmy Hoffa.
Hoffa disappeared in 1975. The latest effort to find his remains is in a modest residential neighborhood in Roseville, outside Detroit.
Crews began drilling into the concrete Friday to take a soil sample.
The shed is attached to a driveway where a recent radar test revealed a shift in the soil. The new search is related to a tip from a man who claims he saw a body being buried under the driveway 35 years ago. He thinks it might have been Hoffa.
Police Chief James Berlin says results of the soil samples could be ready by Monday.