Dr. Kenneth Atkinson, a 65-year-old physician, was shot and killed while aiding a wounded neighbor during a domestic violence incident in a Centennial neighborhood on April 4, 2016. A woman, Elizabeth Lyons, had been shot by her husband and fled across the street; Dr. Atkinson went to assist her and, while kneeling to provide medical aid and call 911, was warned that the assailant was approaching.

The gunman, identified as Kevin Lyons, shot Dr. Atkinson in the leg and, after the doctor tried to take cover behind a vehicle, pursued and shot him again at close range. Deputies arrived shortly afterward and took Kevin Lyons into custody. Elizabeth Lyons and another neighbor who had been shot were hospitalized and survived; Dr. Atkinson was mortally wounded and died at the scene.

Kevin Lyons was arrested and charged in connection with the shootings. Does anyone have information about Dr. Atkinson, his life in Centennial, or witnesses who were nearby that day?