Silent Killer, the Brooklyn producer Sean Shah, founded the New York label Herd Killing Recordings and works in production and DJing. His music has appeared on Outbreak Ltd, Obliterati, Hate, Ohm Resistance, Guerilla, Counterstrike and Algorythm. With longtime collaborator Breaker, he made the album Amongst Villains; his other album is Everyone Bleeds. He has also worked with Counterstrike, Submerged, Enduser, KJ Sawka, DJ Hidden, Cooh and Scorn. Shah also works as an artist, and Herd Killing is an independent New York City label.
His collaboration with Rex Riot, Head Vice, featured in a worldwide Nintendo Wii U launch commercial. Herd Killing releases include the 2019 single Downfall (Diode Remix), with Diode, and the 2021 single Propaganda (Kemal Remix), with Inerpois and Kemal (DnB). The label released Quantum Pyre and the UFO collaboration Downfall (Dialective, Protoss & Short Circuit Remix) in 2024, followed by Cauldron, a 2025 collaboration with Kemal (DnB).