Question

American believed killed by isolated tribe on Indian island

Answer 1

They probably live in the Andaman and Nicobar islands.

Answer 2

I've read about that island a few months back and how it can be deadly to even go there! North Sentinel Island has been off limits for many years because of that isolated tribe. Wrong place to go and try to convert the natives.

https://www.theguardian.com/world/2018/nov/27/sentinel-island-calls-to-leave-body-of-american-killed-by-tribespeople

http://northsentinelisland.com/north-sentinel-history/

Answer 3

He should not have gone there.