PROVIDENCE, R.I. (WPRI) – The FBI is offering a reward of up to $100,000 for information that leads to the whereabouts of one of the longest tenured fugitives on its “Ten Most Wanted” list.

Donald Eugene Webb is accused of murdering Pennsylvania Police Chief Gregory Adams in 1980.

Friday, December 4, 2015 marked the 35th anniversary of the deadly shooting. Webb would now be 84 years old.

Gregory Adams was the chief of the Saxonburg Borough Police Department when he was beaten and shot to death after a routine traffic stop. Investigators say Adams pulled Webb over around three o’clock that afternoon.

At the time, Webb was a 50-year-old career criminal, known to specialize in jewelry store burglaries. He was believed to have been in the area to case a possible burglary target.

Webb was also a federal fugitive wanted for a jewelry store burglary in the Albany, New York area and was known to reside under an alias in hotels in Eastern Pennsylvania.

Police say Webb was likely wounded in the confrontation with Chief Adams. A white Mercury Cougar allegedly used by Webb as a getaway vehicle was found on December 21, 1980, at a Howard Johnson’s parking lot in Warwick.

Webb lived in New Bedford; investigators believe he returned to Southern New England after the murder. Blood evidence linked in type to Webb was recovered from the Mercury.

Webb was also known to associate with people from Fall River and Taunton who were connected to members of the Patriarca Crime Family.

The reward that the FBI is offering is payable, not only to any person who can help agents arrest Webb, but also to any person who can take them to a location of Webb’s remains.

Anyone who may have information regarding the whereabouts of Donald Eugene Webb, dead or alive, is asked to contact the FBI at 1-800-CALL-FBI (1-800-225-5324).