The FBI was led to the well by convicted serial killer Wesley Shermantine.
A year ago, a well site given to authorities by Shermantine turned up the remains of four adults and a fetus. At the time, Shermantine said that investigators had still not found the "boneyard" where the majority of his and his co-defendant Loren Herzog's victim are buried.
Death row inmate, Shermantine began talking about more possible victims after last year's findings and was offered $28,000 by bounty hunter Leonard Padilla. Shermantine began talking to authorities about more locations, including the Linden well recently searched, but then complained that he received no money and he stopped talking.
Shermantine Not Talking
"We are disappointed that our efforts did not yield remains, offering closure to families who suspect that Wesley Shermantine and Loren Herzog were involved in the disappearance of their loved ones," said special agent Herb Brown.
Brown said the FBI wants to talk with Shermantine about more possible burial sites, but he has not been forthcoming.
Shermantine told the FBI about the Linden well in January 2012. Shortly thereafter, on Jan. 16, 2012, his co-defendant Herzog, who was on parole, committed suicide.
Profile: Wesley Shermantine and Loren Herzog
Photo: Mug Shot