Surveillance video shows there was a short altercation and struggle as the clerk tried to defend himself with a knife he had picked up and hidden behind his back. Five to 10 seconds later, the robber shot the clerk, and the clerk called 911 himself after the suspect fled the scene. Video footage doesn't show whether the suspect fled on foot or in a car. York County Coroner Sabrina Gast said 22-year-old Malek Salem died of a gunshot wound to the chest.