Sam Bankman-Fried and other FTX staff allegedly had ‘Wirefraud’ chat group
www.theguardian.com
Chat group on the platform Signal was reportedly used to send end-to-end encrypted information about FTX and its hedge fund

I don’t see refenece in this article or any others, but how did prosecutors get access to SBF’s Signal messages?

Was it simply a court order that he unlock his phone (and agreed), or a codefendant who flipped to the prosecution and handed over the thread?