In Columbus, Ohio, hundreds of protesters staged sit-ins and marched on police headquarters Wednesday to protest the police killing of 16-year-old Ma’Khia Bryant. Authorities have released body-camera video of Tuesday’s killing. The disturbing footage appears to show Bryant swinging a knife at two people as an officer arrived on the scene. The officer fired four shots, killing the girl. Authorities identified the officer as Nicholas Reardon, who joined the Columbus police force in 2019 after serving in the U.S. Air National Guard, where he received an expert marksman badge.