The search for Jimmy Hoffa's remains will continue.

Acting on a tip, soil tests were taken from underneath a shed in the small Detroit suburb of Roseville in late September.  The soil sample was sent to Michigan State University, where a number of tests were performed.  But no human remains were identified and police are wrapping up their investigation.

Hoffa was a well-known union leader when he disappeared in 1975.  He was last seen at a restaurant 50 kilometers from Roseville.

There have been other searches for Hoffa's body.  In 2006, police dug up a horse farm north of Detroit.  In 2003, police dug underneath a pool in the city.

At the time of the most recent dig, Roseville police Chief James Berlin told CBC News that "there was credible information, and we had to follow through with that."

However, some people living in Roseville thought differently.

"Hoffa's not in Roseville," said Steven Kowalik.  "He's not buried under a sidewalk."