The Sunrise Movement has long preached nonviolence even as it pursues aggressive tactics, such as making a racket outside of the hotels where ICE agents sleep.

But the group’s public commitment to peaceful protest did not spare it from a months-long, aggressive campaign of government snooping that included ICE agents attending its meetings and protests undercover, subpoenas of its financial records, and at least one apparent attempt to entice an organizer into backing more confrontational tactics.

The revelations about the tactics ICE used against Sunrise, along with a wide variety of labor unions and protest groups, came in a court filing from a defense attorney for one of 15 Minnesota activists charged in June for trying to stop the federal government’s immigration crackdown in the Twin Cities.