FREMONT, Calif., Aug. 12 (UPI) -- Police say the search for a missing 5-year-old boy with cerebral palsy in Fremont, Calif., now involves an FBI evidence response team.
The San Francisco Chronicle reported Wednesday FBI agents were working with police in Oakland, Calif., to locate Hasanni Campbell, who disappeared from outside an Oakland store Monday.
Campbell's foster father, Louis Ross, told authorities the 5-year-old disappeared from inside his BMW when he went around the corner to visit the shoe store where he works.
Ross's vehicle has since been seized as evidence in the missing child case and search-and-rescue dogs have been brought in to comb the area around the family's Fremont home.
KGO-TV, San Francisco, said the hunt for the child has also involved door-to-door visits of area homes by investigators.
Authorities did not specify what Tuesday's search in Fremont was intended to find since it was not focused on the site of the child's disappearance.
"We are keeping all investigative leads open at this time. We cannot discount any possibility at this point in the investigation," Sgt. Ray Backman of the Oakland police said.
Hasanni's godmother, Regina Douglas, told the Chronicle she doubted Ross and his fiancee, Jennifer Campbell, were involved in the disappearance. Authorities said Campbell is the missing boy's aunt.