This morning’s news updates out of Brazil say that police have confirmed the killing was an assassination, at least 10 shots were fired (14 entry/exit wounds have been found on the body) and that due to the method of the killing and as nothing was stolen, it was almost certainly a contract killing, for reasons as yet unknown.
UPDATE: This report from local newspaper Diario de Pernambuco states that Araújo had told his colleagues that he’d been getting death threats from illegal loggers, as he headed up a program to stop deforestation in the region.