In October 2018, Proud Boys founder Gavin McInnes was invited to speak at the Manhattan Republican club, drawing neo-Nazi supporters and antifa protesters; Proud Boy thugs waded into the protest and began indiscriminately attacking the protesters.
The Manhattan DA filed assault and riot charges against four Proud Boys, but that's not all: the DA's office also served Google with a "reverse search warrant" seeking the names of the owners of every mobile device present on the scene, in a bid to unmask and charge antifa protestes.
This marks the first known instance in which the Manhattan DA has used the controversial "reverse search warrant."
The Manhattan District Attorney's Office admitted it demanded Google hand over account information for all devices used in parts of the Upper East Side. They didn't do this to find the Proud Boys; they did it to find Antifa members.
Manhattan DA Made Google Give Up Information on Everyone in Area as They Hunted for Antifa [Albert Fox Cahn/The Daily Beast]
(Thanks, Kathy Padilla!)