Investigators looking for links between Phillip and Nancy Garrido, the couple accused of kidnapping and imprisoning Jaycee Dugard for 18 years, and other missing children in the area today unearthed bone fragments at a property Phillip Garrido frequently used.
Contra Costa Sheriff's Department spokesman Jimmy Lee said a cadaver dog sniffed out the bone fragments and they were taken to a lab for examination. Police do not yet know if they are human or animal.
"We are taking very seriously the possibility that he could be connected to some others," San Francisco FBI Special Agent Joseph Schadler told ABCNews.com today.
The revelation that Garrido is being investigated for other missing children is in addition to probes by detectives who say that Garrido is a person of interest in a string of prostitute murders.
Rod Garecht told ABC News that police have contacted him looking for any connection between Jaycee's 1991 abduction when she was 11 and the 1988 kidnapping of his 9-year-old daughter Michaela.
"Anything to keep her in the news and keep people talking about her is good," Garecht said today.
Like Jaycee Dugard, Michaela Garecht was grabbed off the street in broad daylight, pulled into a stranger's car in front of witnesses. His daughter, with her dirty-blonde hair and wide smile, could be Jaycee's twin.
Michaela would now be 30, a year older than Jaycee who was found alive last week at age 29 along with the two daughters fathered by Phillip Garrido.
When Garecht saw the story about Jaycee Dugard last week, Garecht said he wondered if the woman police had found was actually Michaela.
"When I saw her, the picture they showed of her as a child looked a lot like my daughter," he said. "I kept thinking it was Michaela and not that other girl."
Though police have confirmed Jaycee's identity, "there's always a glimmer of hope," Garecht said.
Michaela's abduction was witnessed by a friend, Garecht said after the two girls had finally won hard-bargained permission for a scooter trip to the corner store for sweets, about a block away.
Garecht said that one of the girls' scooters was moved from near the store's entrance to leaning against a car in the parking lot. It was his daughter who ran over to retrieve the scooter and when she did, the kidnapper yanked her into the car right in front of her friend.
"There's still a possibility that she's alive," Garecht said, although he added, "not much possibility."
Michaela Garecht and Jaycee Dugard were two in a string of young girls who disappeared in the late 1980s and 1990s. Schadler said that they are looking specifically at abductions that took place after Garrido was paroled in the late 1980s after serving prison time for kidnapping and rape.
"The issue with Jaycee being found is just something that reinforces our hope," Mike Misheloff told ABCNews.com.
It's been more than 20 years since 13-year-old Ilene Misheloff was kidnapped while walking home from school in Dublin, Calif. She was last seen on Jan. 30, 1989, less than 200 yards from a shortcut over a creek bed that her parents learned Ilene used only after her disappearance.
Misheloff said that while the news that Jaycee Dugard had been found 18 years after her 1991 kidnapping lifted his hopes, he did not immediately believe there was a connection between her case and his daughter's abduction.