Hannah spotted with captor
Hannah was seen with DiMaggio in his car about 20 hours before he allegedly set fire to his house, police said.
The two were in his blue Nissan Versa just after midnight Aug. 4, the San Diego County Sheriff's Department said. They were spotted at a U.S. Border Patrol checkpoint, according to Jan Caldwell, a spokeswoman for the San Diego County Sheriff's Department.
Caldwell did not say what the two were doing together or whether Hannah was with DiMaggio voluntarily.
CNN was unable to get an Anderson family response to this revelation.
Search warrant raises eyebrows
Phone records indicate the two "called each other approximately 13 times" shortly before both their phones were turned off on Aug. 4, a search warrant revealed.
The same document says that a fire was reported later that night at DiMaggio's two-story log cabin and a detached garage in Boulevard, Calif.
After battling the fire, authorities found the bodies of Hannah's mother and brother.
An affidavit claimed that both had been "tortured and killed" by DiMaggio, who then set his home and garage ablaze.
San Diego County deputies searching DiMaggio's charred home also found a handwritten note, handcuff box, camping equipment, a DNA swab kit, two used condoms and letters from Hannah, according to an affidavit.
Contents of the letters and the handwritten note were not revealed.