The FBI is searching for the remains of more victims of the Speed Freak Killers in a well in San Joaquin County in California, not far from a site where at least four people were found, the Mercury News reports.
Federal authorities expect the excavation of up to 50 feet will take two weeks.
The FBI took over the excavation from the San Joaquin County Sheriff’s Department, which mishandled the operation, Mercury News reported.
The Speed Freak Killers are Wesley Shermantine and Loren Herzog, who are accused of a methamphetamine-fueled killing spree in the 1980s and ’90s.
“We all remain hopeful that our efforts at this site will ultimately return the remains of victims to their loved ones, but know that such is not a certainty,” Herbert H. Brown, special agent in charge of the Sacramento Division of the FBI, said Monday. “Our hearts go out to the many families who hope that this excavation may bring closure to their long, painful wait for the return of their loved ones. We will not recklessly speculate; our goal is to offer incontrovertible fact to our law enforcement partners, the families of the missing and the public.”