Overview
- Salt Lake County prosecutors filed a second-degree manslaughter charge against Matthew Scott Alder in the killing of Arthur “Afa” Folasa Ah Loo at the June 14 No Kings march.
- Investigators say Alder, a volunteer peacekeeper hired by SLC 50501 and not a police officer, fired three rounds at Arturo Gamboa as he assembled a rifle.
- One bullet wounded Gamboa and another struck Ah Loo, and prosecutors contend only the fatal third shot falls outside self-defense.
- Alder has cooperated with investigators, was criminally summoned rather than arrested, and is expected to appear in court.
- Detectives recovered a disassembled AR-15 and three loaded magazines from Gamboa, who faces no charges under Utah’s open-carry law, and Ah Loo’s family plans a wrongful-death suit and urges event-safety reforms.