By Jim Smith

DARTMOUTH (CBS) – Human remains were found behind a home in Dartmouth as part of a cold case investigation. FBI agents joined Massachusetts and Pennsylvania state police at the home on Maplecrest Drive Thursday.

The FBI confirms the operation is in connection with the search for longtime fugitive Donald Eugene Webb, who has long been the suspect in the 1980 murder of then Saxonburg, Pennsylvania Police Chief Gregory Adams, a husband and father.

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According to multiple reports, the scene is the home of the suspect Webb’s ex-wife and there’s word investigators have found a so called secret room inside the house.

Bristol County District Attorney Tom Quinn would not say who they believe the remains belong to or what led them to dig in the backyard. Quinn said the medical examiner would determine cause of death and when it happened. He would also not discuss if anyone would face charges related to the discovery.

Saxonburg Pennsylvania Police Chief Gregory Adams was murdered in 1980 (WBZ-TV)

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Current Saxonburg Chief Joseph Beachem was in Dartmouth Thursday, a sign of how committed investigators are 36 years later.

“It’s the biggest question mark in our town’s history so we’re hopeful we’ll see what happens in the next short time here,” Chief Beachem said. “I think it means a lot to all officers. You can’t help but look at Chief Adams’ family and see your own.”

Donald Eugene Webb in 1979. (Photo credit: FBI)

The FBI has said Webb had ties to southeastern Massachusetts and Rhode Island. In December 1980, the feds say his white Cougar was found at a Warwick, Rhode Island rest stop.

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Neighbors say the cops have been at the home several times before. As evening approached, police appeared to be preparing to work into the night.