(AP) - 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.

While Alder had a right to use lethal force to stop a perceived threat and a right to carry a gun under Utah law, his third shot, fired over people’s heads at a large gathering, was reckless and constituted a crime, Gill said.

“In this case our argument is that the thir

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