Police in California are continuing to search the home of the couple charged with kidnapping a little girl and hiding her for 18-years.
Detectives suspect the pair may also be behind the killing of several prostitutes during the 1990s.
Contra Costa County Sheriff’s Department spokesman, Jimmy Lee said: “One bone fragment was found, it was found on the neighbour’s property at 1540, it was a small bone fragment and as you know Phillip Garrido had access to that property and we know that he used it and it looked like he lived on his shed there.”
Testing to determine whether the fragment is human or animal is expected to take several weeks.
Neighbours say Phillip Garrido once worked as the property caretaker.
Other nearby police forces are now investigating whether he might have been involved in their missing cases.
Garrido and his wife Nancy have pleaded not guilty to 29 charges including kidnapping, rape and imprisonment of Jaycee Lee Dugard.
Detectives believe that Jaycee, who is now 29, spent most of the past two decades living in squalid tents and sheds in Garrido’s backyard. He is also accused of fathering two children with her.
Police have re-released a reconstruction of her abduction in the hope of jogging someone’s memory.
But so far it appears that only Antioch locals have come forward say they thought Jaycee was his daughter as they saw her working in his printing shop business.