A handwritten note, handcuff box, camping equipment and a DNA swab kit were among the items found by San Diego deputies in the burned home and garage of James DiMaggio.
DiMaggio was shot and killed by FBI agents in Idaho after allegedly kidnapping Hannah Anderson,16, this month.
The list of items is included in a search warrant and affidavits CNN affiliate KFMB obtained.
It detailed what authorities found in the aftermath of the Aug. 4 fire at DiMaggio's home, about 45 miles east of San Diego in the community of Boulevard, and how investigators believe the fire was started.
Other items found on the nine-page list of things seized from the home and the adjacent garage include incendiary devices, a gas can, rolls of duct tape, used condoms, ammunition, an arson wire and letters from Hannah.
Contents of the letters and the handwritten note were not revealed in the affidavit.
When specifically asked about the note by KFMB, the sheriff's department deferred.
"Many portions of this investigation cannot be discussed," said spokesperson Jan Caldwell. "Sorry this is one if them."
Also recovered was a map of Yosemite -- a possible clue as to where DiMaggio intended to take Hannah.
The list also contained seemingly benign items such as balloons, a fly swatter and a Popsicle box.
The court documents did not specifically tie any of the items to DiMaggio's alleged crimes.
DiMaggio flees with Hannah
Hannah went missing after cheerleading practice in San Diego County on Aug. 3.
The next day, the bodies of her mother, Christina Anderson, 42, and brother, Ethan, 8, were found at the DiMaggio property.
That horror spurred a manhunt, which zeroed in on central Idaho after two critical clues: the discovery of DiMaggio's blue Nissan Versa outside the city of Cascade, and a sighting of the pair by horseback riders.
One of the horsemen recalled noticing multiple "red flags" during their brief interaction with the pair, including their brand-new camping equipment and the pajama-like bottoms Hannah was wearing.
Father Brett Anderson said Thursday that he'd been able to offer "our thanks and our love" to the horseback riders in a phone conversation.
"It was a chance encounter, but it did save my daughter's life," he said Thursday.
The ordeal ended Aug. 10 after authorities spotted DiMaggio and his teenage captive's campsite near Morehead Lake.
Hostage rescue teams had to hike more than two hours to get to the scene, local sheriffs' departments said. Eventually, they got close enough, and an FBI tactical agent fatally shot DiMaggio, before whisking Hannah away.