Read more of this story at Slashdot.
JoeyRox shares a report from CNBC: Federal investigators claimed to access encrypted Signal messages used to help charge the leader of the Oath Keepers, an extremist far-right militia group, and other defendants in a seditious plot on Jan. 6, 2021. It's not clear how investigators gained access to the messages. One possibility is that another recipient with access to the messages handed them over to investigators. The complaint references group messages run on the app, so it's possible another participant in those chats cooperated.