A demonstrator was shot and killed at Salt Lake City's “No Kings” protest when a man believed to be part of the event's peacekeeping team fired at another man allegedly aiming a rifle at protestors, authorities said Sunday. Police took the alleged rifleman, Arturo Gamboa, 24, into custody Saturday evening on a murder charge, Salt Lake City Police Chief Brian Redd said at a Sunday news conference. The bystander, Arthur Folasa Ah Loo, 39, died at the hospital. MORE: https://www.wthr.com/article/news/nation-world/protester-shot-killed-in-utah/507-714e6168-019f-4d83-9899-a6fe7c96f161