Ahmad Alissa has pleaded not guilty by reason of insanity to 10 counts of first-degree murder, 47 counts of attempted first-degree murder, one count of first-degree assault, six counts of felony possession of a prohibited large capacity magazine, and 47 crime of violence sentence enhancers in connection with shootings on March 22, 2021. Police were called the Boulder King Soopers store for a report of an armed man who had shot a person in a vehicle in the store's parking lot and was inside the store. Eric Talley, a 51-year-old Boulder police officer, was the first to arrive, and was shot and killed. Police said Alissa fired at other responding officers before one of them shot Alissa in the leg. Alissa later surrendered to police. Officers found weapons and tactical body armor at the scene. In addition to Officer Eric Talley, Denny Stong, 20; Neven Stanisic, 23; Rikki Olds, 25; Tralona Bartkowiak, 49; Teri Leiker, 51; Suzanne Fountain, 59; Kevin Mahoney, 61; Lynn Murray, 62; and Jody Waters, 65, were killed in the shooting.