Salt Lake City police are investigating the roles of two self-described "peacekeepers" following a fatal shooting at Saturday's protest that left one person dead and another injured, raising questions about unauthorized security at public demonstrations.

Utah officials are investigating the role that so-called peacekeepers played in the killing of celebrated fashion designer Arthur Folasa Ah Loo on Saturday at the “No Kings” demonstration in Salt Lake City,

Arthur Folasa Ah Loo, who was shot dead during the 'No Kings' protest, was a Samoan fashion designer. He competed on season 17 of Project Runway. Know more details about him.