Transcript for Authorities claim to know where American missionary is buried
Next to new developments after the death of an American missionary on a remote island. Authorities now say they know where he is buried. It comes as we see his haunting last words written in his journal in the days just before he died. Here's ABC's Lana Zak. Reporter: Tonight, local Indian officials say they believe they know where American missionary John CHAU is likely buried, but that it may not be possible to retrieve his remains without endangering more lives. The 26 year old illegally snuck into north sentinel, to try and convert one of the last groups of indigenous people completely isolated from the outside world. The group, estimated between 40-400, are hostile to outsiders. You can see in this picture a tribesman pointing a bow and arrow at a helicopter doing a welfare check after the 2004 tsunami. But CHAU reportedly knew the risks, bribing local fishermen to take him close to the island. Those who knew him say he wouldn't be dissuaded. This was what god has called him to do, which is to go and share the love of god with these people. Reporter: In pages of his diary obtained by ABC news, CHAU wrote --"Please do not be angry at them or at god if I get killed" underlining this sentence -- don't retrieve my body. Reporter: Tom, the fishermen who helped CHAU get to the island have been charged with culpable homicide. Anthropologists are asking that the sentinelese be left alone since their immune systems are undeveloped and infection for them can be deadly. Tom. Lana Zak with the haunting journal entries.
This transcript has been automatically generated and may not be 100% accurate.