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SAN DIEGO (KTLA) -– Hannah Anderson’s mother, Christina, died of blunt force trauma to the head, the San Diego County Medical Examiner’s Office announced Monday.

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Hannah Anderson arrives for fundraiser at Boll Weevil restaurant in Lakeside on August 21.

The bodies of the 44-year-old woman and her 8-year-old son Ethan were found in a burned-out home belonging to suspected killer James Lee DiMaggio.

A series of warrants released last week showed investigators found a crowbar near Christina Anderson’s body.

A cause of death for Ethan had not been disclosed.

Also Monday, it was revealed that DiMaggio left his life insurance to Hannah and Ethan’s grandmother.

A family spokesman confirmed the 40-year-old left $112,000 to Bernice Anderson, whom he named his beneficiary in 2011.

He indicated that the money was to go to Hannah and Ethan, according to spokesman Andrew Spanswick.