RIO DE JANEIRO — A third person was arrested on Saturday in connection with the killings of a British journalist and a Brazilian expert on Indigenous peoples who went missing while deep in the Amazon nearly two weeks ago, the police said before sharing grisly details about how the pair was murdered.
The disappearance of Dom Phillips, 57, a freelance journalist, and Bruno Araújo Pereira, 41, a former government official who worked in the area to combat illegal fishing, hunting and mining,…