The break in a decades-old cold case that led to the remains of career criminal and wanted fugitive Donald Eugene Webb emerged out of a gambling investigation.

When the FBI announced that Donald Webb's remains had been unearthed behind his ex-wife Lillian Webb’s 28 Maplecrest Drive home on July 13, it was noted that the break came from a “separate investigation,” according to an FBI spokesperson.

According to a spokesperson for Massachusetts Attorney General Maura Healey’s office, the office's ongoing investigation into an “illegal gambling operation” provided information that led to State Police officers assigned to the office to issue the search warrant to search the Webb home. No further information about that investigation is being released, the spokesperson said.

Donald was wanted in connection to the 1980 murder of Saxonburg, Pennsylvania Police Chief Gregory Adams, who was gunned down during a traffic stop in the small town outside of Pittsburgh.

According to a copy of the search warrant obtained by Dartmouth Week, investigators arrived at the home specifically to search for the body of Donald Webb, outlining a search area including the residence and under the earth within the boundaries of the property. Lillian Webb was also named as a person to search for possible evidence.

Investigators were also authorized to search for evidence that Webb was living in the residence prior to his death, trace and biological evidence, and information that could identify any other co-conspirators associated with the death of Chief Adams, according to the search warrant.

The case has brought investigators to the 28 Maplecrest Drive home on several occasions. Last month, it was revealed in a lawsuit filed on behalf of the slain police chief’s family that a hidden room containing a cane was discovered in the home, prompting the family to believe Donald’s family may have been complicit in helping him remain on the run.

Donald’s remains were discovered buried in the backyard of the house after the July 13 search. It was revealed that Webb died in 1999, according to the FBI.

The Pittsburgh Post-Gazette reported that Lillian Webb divulged the location of the body and was granted immunity from prosecution.