At a news conference on Wednesday, Amazonas’ State Security Secretary General Carlos Alberto Mansour said the suspect is under investigation in police custody.
Mansoor said the man was arrested after being found in possession of “a lot of drugs” and ammunition used for poaching.
Authorities said on Wednesday they were investigating a range of things, including murder, and added that they still “can’t rule out anything.”
Mansoor noted that police have also questioned five others in connection with the disappearance of Phillips and Pereira, who had traveled to the area to conduct research for a book project on conservation efforts in the area.
According to the coordination of the indigenous organisation, Phillips and Pereira have been missing for more than 72 hours. The organization, known as UNIVAJA, said satellite information showed the couple’s last known location in the So Rafael community on Sunday morning, where they expected to meet a local leader who never showed up.
a “dangerous” zone
On Wednesday, Federal Police Superintendent Fontes described the area where Phillips and Pereira went missing as “complicated” and “dangerous”.
“In the region, violence is progressing in an increasingly uncontrolled manner in the context of invasion of the indigenous lands and lands of the state, suppression of press freedom and the work of journalists,” UNIVAJA said in a statement.
In 2018, Phillips reported on illegal mining and threats posed by ranchers to unrelated indigenous groups there, with Pereira at the center of that article.
Survival International, an NGO that advocates for indigenous peoples, said that Pereira had previously received “many threats” as a result of her work as an “accomplice of the indigenous struggle”.
Tara Subramaniam wrote from Washington, DC. Camilo Rocha and Marcia Reverdosa reported from Sao Paulo, Brazil.