Andrew Spanswick, a spokesman for James DiMaggio's family, said the 40-year-old left $112,000 to Bernice Anderson, whom he named his beneficiary in 2011.
DiMaggio's sister spoke to him once about his beneficiary, Spanswick said, and he indicated that the money was to go to Hannah and her brother, Ethan. DiMaggio told his sister he didn't want to leave it to the children's parents because he felt their relationship was "too unstable" and they might divorce, Spanswick said.
DiMaggio, who was best friends with Hannah and Ethan's father, was so close a friend to the Anderson family that the children called him "Uncle Jim."
He was shot and killed in a remote stretch of Idaho wilderness Aug. 10 when
Hannah was rescued safely. DiMaggio, who authorities said fired at least once at the agents before he was killed, was shot at least five times in the head and torso, the Valley County, Idaho, coroner said.
The search began Aug. 4, after the bodies of Hannah's mother and 8-year-old brother were found at DiMaggio's burning San Diego County property. Authorities allege that DiMaggio set up a trap by asking the family to come to his home so he could say goodbye before moving to Texas.
Christina Anderson's body was found in a standalone garage, with blood near her head and a crowbar nearby, according to search warrants released last week. Her son's body was later found burned in the home. Both had been "tortured and killed," the documents noted.
The family's "medium brown dog" was also found shot to death under a sleeping bag, the warrants said.
Investigators believe the fires on the property were set separately, possibly with timing devices and accelerant, according to the warrants. Incendiary devices and "arson wire" were later found on the property.
The search warrants provided some insight into the investigation, including the communication between Hannah and DiMaggio. Letters from Hannah were among the items seized from his home, the documents showed, and investigators said the teen and DiMaggio "called each other approximately 13 times" before their cellphones were shut off about 4 p.m. Aug. 4.
The documents did not specify during what time period the calls occurred. They also did not detail what the letters -- along with a handwritten note seized from DiMaggio's property -- said.
San Diego County sheriff's spokeswoman Jan Caldwell said Friday that the department's investigation was ongoing and declined to comment on the specifics of the warrants.
But she reiterated previous comments from Sheriff Bill Gore, who said Hannah "was not a willing participant."
"As Sheriff Gore said earlier in the week, Hannah is a victim in every sense of the word," Caldwell said in an email. "Our follow-up investigation has not changed that sentence."
Hannah, who has returned to California, attended a fundraiser held on her behalf Thursday at a Lakeside restaurant. She did not speak to reporters as she walked inside, but her father said she "sends her love" and was "doing good day by day."