A federal case in Atlanta is raising questions about a privacy-focused mobile operating system, with prosecutors arguing that its features were used to erase evidence. The US Department of Justice is attempting to prosecute Atlanta resident Sam Tunick under a federal statute that makes it a crime to destroy property in an effort to prevent it from being seized. The case centers on Tunick's use of GrapheneOS, an open-source operating system that works on Google Pixel phones and lets users enter a passcode to wipe a device clean. Experts said the legal approach is unusual and may be the first...