“The US Department of Justice is attempting to prosecute an Atlanta resident in connection with the movement against the police training center known as Cop City because he had GrapheneOS on his phone, an open-source operating system that enables users to enter a passcode and wipe a phone clean,” writes Timothy Pratt at The Guardian.
GrapheneOS uses a feature called a “duress password.” If police demand the password to your phone, you give them the duress password instead and it wipes the phone clean.
When Tunick arrived in Atlanta, agents questioned him about child sexual abuse images. “Tunick asked four times during the interrogation to speak with a lawyer, but was rebuffed each time, according to courtroom testimony. Additionally, the agents produced no warrant and did not read Tunick his rights.”