On the morning of November 19, 1961, a 23-year-old American stripped to his underpants off the southwest coast of Dutch New Guinea. He tied two empty jerrycans to his belt for flotation and started swimming toward a shoreline he could barely make out. His catamaran had swamped and capsized the day before at the mouth of the Betsj River. He and the Dutch anthropologist beside him had spent the night clinging to the hull as it drifted out to sea.
René Wassing stayed with the boat and was spotted by a search plane the following day. Michael Rockefeller was never seen again by anyone. The question of what happened to him splits into two answers that share almost no common ground, and the mystery has remained open for more than six decades.
What Is Actually Known
Nelson Rockefeller's son had graduated from Harvard in 1960 and come to New Guinea to collect art. The Metropolitan Museum's Michael C. Rockefeller Wing carries his name and is built partly around the Asmat sculpture he gathered on two trips that year. He was buying bisj poles and carved shields in villages that had seen very few outsiders, paying in tobacco and steel axes.
The crossing that killed him was routine and badly judged at the same time. The catamaran was two dugout canoes lashed together under an outboard motor, and the river mouth where they swamped is a tidal collision of fresh water and open sea. The engine failed in rough water miles from land. Estimates of the swim he attempted run from three miles to ten, depending on where the hull had drifted by morning.
What followed was one of the largest searches the region had ever seen. Dutch ships, aircraft and helicopters worked the coast for roughly two weeks. His father flew out from New York, and reporters arrived in numbers the territory had no way to accommodate. Nothing was recovered, not the body and not the jerrycans. Coverage turned a private emergency into an international story inside a week, and that attention is part of why the case never closed on its own.
The Case For Drowning
Heavy tidal currents run through that river mouth, and the shore behind it is mangrove swamp with nowhere obvious to land. A swimmer towing improvised floats is working against a sea that moves faster than he does. Saltwater crocodiles and sharks are both common in those waters. He had also already spent a night in open water holding onto a hull before he started swimming.
This was the conclusion the Dutch quickly arrived at. The search wound down after about ten days with drowning accepted as the likeliest explanation. The family has held roughly that line ever since. His twin sister, Mary Rockefeller Morgan, told People there is no direct or conclusive evidence of how her brother died, which is a careful sentence and an accurate one.
The missing body is not conclusive of anything. In that stretch of coast, a drowned man disappears as thoroughly as one that’s a victim of foul play. The absence of remains is exactly what allowed a second explanation to grow in the space where an answer should have been. Rumors reached Western newspapers inside a year, and journalists have been traveling to the Asmat coast to chase them ever since.
The Case For Otsjanep
That second answer was already circulating within weeks. Writing in Smithsonian, Carl Hoffman reported that two Catholic priests independently heard accounts in December 1961 from men in the village of Otsjanep describing the killing, down to the detail of his underpants and a list of fifteen men said to be holding different bones. A Dutch patrol officer later obtained a skull missing its lower jaw.
The motive predated his arrival by three years. In 1958 a Dutch colonial patrol shot five Otsjanep leaders, and under Asmat practice a death of that kind created an obligation to respond in kind. The men named in the priests' accounts were the successors of the men who had been killed. A wealthy stranger coming ashore alone could very well have become the victim of a blood debt.
None of this is proof. NPR's review of Hoffman's book called the case mostly solved, which is about right. The accounts are secondhand, taken by missionaries from men who had good reason to watch what they said. The Dutch were negotiating their way out of the territory and wanted no part of a cannibalism story. Western New Guinea went to a UN administration in 1962 and to Indonesia in 1963, and nobody was going to open an investigation after that.
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