Since the early 2010s, many U.S. cities have been equipping their police officers with body cameras, small recording devices that attach to the chest. Officers wearing the cameras are required to turn them on at the beginning of each shift. Screeching tires. Gunshots. Sirens. The camera as evidence. The viewer's gaze is subjected to the bodycam's lens and he becomes a witness in spite of himself... But where does the camera look when the one who films is the one who kills?