Strange Outdoor Mysteries

The Dutch colonial government and the Rockefeller family organized a massive search, with more than a thousand canoes probing the southern coast for ten days. They found nothing, and in 1964, Michael was declared legally dead. But in 1969, prompted by a story from an Australian smuggler who claimed to have seen Rockefeller on a tiny outlying island, American journalist Milt Machlin launched his own investigation. In the end, Machlin dismissed such sightings. "I don't believe he was alive elsewhere," says Machlin, whose 1972 book The Search for Michael Rockefeller chronicled his investigation. "I think he was killed almost immediately after making shore." Machlin holds that Rockefeller's murder was an act of revenge for the killing of several local villagers by a Dutch colonial patrol.

This and more at the above link.

(Via Professor Hex)