Valley County Coroner Nathan Hess confirmed Tuesday that the multiple gunshot wounds to DiMaggio's head, chest and extremities were the cause of death of the 40-year-old San Diego man.
DiMaggio died Aug. 10 after his campsite was spotted in the vast Frank Church River of No Return Wilderness.
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He became the focus of a massive manhunt for allegedly abducting 16-year-old Hannah Anderson and killing her brother Ethan and her mother Christina at DiMaggio's Boulevard, Calif., home about 65 miles east of San Diego. Hannah Anderson was rescued.
The final autopsy is pending a toxicology report. The death has also been classified as a homicide.