The company behind Twitch, the Amazon-owned online video game streaming service, has filed a lawsuit against unidentified online trolls who last month flooded Twitch.tv with pornography and violent images—including bodycam footage from the shooter at the Christchurch, New Zealand, mosques where 51 people were killed in March.

Lawyers for San Francisco-based Twitch Interactive Inc. at Perkins Coie sued the John Doe defendants in the U.S. District Court for the Northern District of California on June 14 bringing claims of trademark infringement and breach of contract as well as claims of trespass and common-law fraud under California law.