Utah investigators sought help from the public on Wednesday as they work to unravel who was at fault when a safety volunteer at a weekend “No Kings” rally fired at an alleged gunman and inadvertently hit and killed a protester.

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.

A 39-year-old man died Saturday after being shot during a large “No Kings” protest in downtown Salt Lake City, Salt Lake City Police Chief Brian Redd said Sunday.

Arthur Folasa “Afa” Ah Loo was described by Salt Lake City, Utah, police officials Sunday as “an innocent bystander.”