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.

Arthur Folasa Ah Loo was a former contestant on “Project Runway,” whose designs were beloved by celebrities from “Real Housewives” to “Moana” star Auli’i Cravahlo.

Two days after a bystander was shot and killed by a stray bullet at Saturday's "No Kings" protest, the SLCPD confirmed it is investigating the role of the “peacekeeper” who fired their weapon at a suspect who faces murder charges.