A safety volunteer accused of fatally shooting a man taking part in a "No Kings" protest last June in Salt Lake City while firing at another man he believed to be a potential mass shooter has been charged with manslaughter, prosecutors announced Wednesday.

Matthew Alder allegedly fired three shots — one hitting a man who had been seen assembling an AR-15 rifle near the crowd and a third inadvertently killing the rally participant, Arthur Folasa Ah Loo, according to Salt Lake County District Attorney Sim Gill.

Gill told reporters at a news conference that the facts surrounding this case were "very nuanced and complex," with Utah's complicated gun laws among them. As CBS affiliate KUTV reported, the district attorney said that the state requested a grand jury from a panel of five ju

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