Donald Webb was wanted in the fatal shooting of Saxonburg, Pennsylvania police chief Gregory Adams.
Police said Webb shot Saxonburg, Pennsylvania, Police Chief Greg Adams during a traffic stop. A message was left at her home.
The FBI says it appears Webb died 17 years ago.
Saxonburg police Chief Joe Beachem and Mayor Bill Gillespie were driving back to Saxonburg from Lillian Webb's home in MA as the news of the remains being identified came in.
Boston 25 News first told you last month about the Federal Bureau of Investigation recently getting a tip about a secret room inside Lillian Webb's house. Prosecutors in both MA and Pennsylvania confirmed to The Associated Press on Friday that authorities have agreed not to prosecute Lillian Webb in the investigation.
Little is known about Webb's whereabouts from the time of the murder until his own death, which officials now believe occurred in 1999.
The FBI and state police in Massachusetts and Pennsylvania discovered human remains Thursday at Lillian Webb's home on Maple Crest Drive in Dartmouth, Massachusetts.
Thomas King III, an attorney for Mary Ann Adams Jones and Adams' two sons, had filed a civil lawsuit against Lillian Webb last month after learning that Webb had a hidden room inside her house and the room, accessible through a closet, still had a cane in it and evidence that someone who was injured had stayed there.
Authorities have begun a dig in a MA yard to search for evidence in a decadeslong quest to find a fugitive wanted in the slaying of a Pennsylvania police chief in 1980. "She's guilty of that", Jones said. He was added to the list on May 4, 1981, and removed from it on March 31, 2007.
The widow of the Saxonburg Police Chief who was shot and killed 36 years ago is speaking out Friday. The FBI is grateful to have been able to play a role in helping to resolve this case.
"Although it's unfortunate Mr. Webb will never be brought to justice to pay for his crimes, we're hopeful the (Adams) family can find some closure in knowing that this alleged murderer has been located", Harold Shaw, the FBI's special agent in charge in Boston, said in a statement.
'Our thoughts are with the family and we hope this eases their minds, if even only slightly.