The FBI spied on a private Signal group chat of immigrants’ rights activists who were organizing “courtwatch” efforts in New York City this spring. Brad Lander, New York City’s comptroller, condemned the FBI’s report in a statement, saying the “FBI surveillance tactic is ripped straight out of the J Edgar Hoover playbook”. 

the Guardian
The FBI spied on a Signal group chat of immigration activists, records reveal
Exclusive: Agency accessed private conversations of New York ‘courtwatch’ group that was observing public hearings