SALT LAKE CITY (AP) — A military veteran who was trying to stop an alleged gunman and inadvertently shot and killed a demonstrator at a Salt Lake City “No Kings” rally was a “safety volunteer” for the demonstration, according to police and organizers.

The alleged rifleman, Arturo Gamboa, 24, was also shot and was taken into custody on a murder charge, Salt Lake City Police Chief Brian Redd said at a Sunday news conference. The bystander who was killed was identified as Arthur Folasa Ah Loo, 39, a fashion designer from Samoa.

Explore an interactive map of the “No Kings” protest and shooting in downtown Salt Lake City below. Some 10,000 people gathered in Salt Lake City for a "No Kings" rally and march as President Donald Trump was overseeing a military parade in Washington, D.C. About an hour into the march, shots were fired.