his wife , Nancy , have pleaded not guilty to 29 felony charges , including rape and kidnapping , stemming from Dugard 's disappearance when she was 11 years old . Investigators believe Garrido kidnapped Dugard in 1991 in South Lake Tahoe , California , fathered two daughters with her and held her captive in a well-hidden compound behind his home in Antioch . After the Garridos were arrested in August , investigators used cadaver dogs to search the couple 's ramshackle home and the surrounding rural property for possible connections to unsolved crimes . Police in Hayward , California , are trying to determine whether Garrido is linked to the 1988 kidnapping of Michaela Garecht , Hayward Police Lt. Chris Orrey said last week . Garecht and Dugard were of similar age and appearance , both were abducted in daylight and a sketch of a suspect resembled Garrido , Orrey said . In Dublin , California , investigators said last week they were looking into whether Garrido was connected to the 1989 disappearance of Ilene Misheloff , who was 13 when she was abducted . Garrido was convicted of kidnapping and raping Katie Callaway Hall in 1976 . He
-LRB- CNN -RRB- -- The bone fragment found near the California home where Jaycee Dugard is said to have been confined for 18 years is `` probably human , '' a sheriff 's spokesman said Tuesday . Jaycee Dugard was locked in a shed tucked under a blue tarp in her alleged captor 's backyard . Investigators said they found the bone last week on a neighbor 's property in an area that Dugard 's accused captor and rapist , Philip Garrido , had access to . The fragment , which was analyzed by an outside expert , will go on to the state DNA lab for testing , Jimmy Lee , director of Public Affairs for the Contra Costa County 's Sheriff 's Office said in an e-mail . `` The expert has determined that the bone fragment found in the backyard of Garrido 's neighbor is probably human , '' Lee said . `` We will be requesting the state to see if it can develop a DNA profile on the fragment . It should be noted that it is not uncommon to find Native American remains in Contra Costa County , '' he said . Garrido and