The producers of the documentary television series Gangland have invoked California’s anti-SLAPP law to trim claims from a lawsuit brought by a former prison gang member turned police informant who alleges they reneged on an agreement to shield his identity.

The plaintiff, referred to in court papers as John Doe, sued Gangland Productions Inc. and A&E Television Networks LLC after his identity was revealed in a 2010 episode of the show, which aired on The History Channel. The revelation allegedly endangered his life and cost him his apartment and his job as an informant.