The Korowai (a.k.a Kolufo) are a people of southeastern Papua (western part of New Guinea island).
Consisting about 3,000 individuals, they were isolated until 1970.
They have been reported to practice ritual cannibalism up to the present day, although this might not be true of clansmen who’ve had frequent contact with outsiders.
The TV show “60 Minutes” was reported to have claimed in 2006 that if someone amongst the Korowai is found guilty of being a “khakhua” (secret witch doctor), he/she is tortured, killed, and finally eaten, with unverified reports claiming that the brain is usually eaten immediately because it tastes best while still warm.
Wikipedia entry on the Korowai people