Soil samples will be taken from beneath a suburban Detroit driveway as police investigate a man's claim he saw a body buried there 35 years ago that might have been that of former Teamsters boss Jimmy Hoffa.
The state Department of Environmental Equality plans to start its work Friday morning in Roseville.
The samples will be sent to a forensic anthropologist at Michigan State University and tested for human decomposition. Results are not expected before next week.
Ground-penetrating radar last week detected an anomaly, or shift, in the soil beneath the Roseville driveway.
Hoffa was last seen July 30, 1975, outside a restaurant in Oakland County. Previous searches for his remains have been conducted at a Michigan horse farm and beneath a swimming pool.