News Many isolated tribes, like Sentinelese that killed American, still exist. Here’s where November 26, 2018November 27, 2018Josh Hafner, USA TODAYComments Off on Many isolated tribes, like Sentinelese that killed American, still exist. Here’s where The death of John Allen Chau by a tribe on North Sentinel Island has turned a spotlight on "uncontacted" tribes around the world.