Hoffman carried out extensive research in the Netherlands as well as New Guinea researching his book Savage Harvest. He claims that once Rockefeller made it to shore, the men of the – a notoriously violent New Guinea tribe – tortured, beheaded and ate Rockefeller in a ritualistic cannibal killing because the Dutch had killed five of their own elite. He was paddling a 40-foot-long canoe with a Dutch anthropologist when it capsized. His body was never recovered.