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, a 39-year-old former contestant on the fashion design competition series, died Saturday after being struck by gunfire, as police refer to him as an “innocent bystander.”