Officer Kirk Griess was struck and killed by a vehicle while conducting a traffic stop on I-80, near Manuel Campos Parkway, in Solano. Another vehicle entered the area and struck both Officer Griess and the vehicle he had stopped. Officer Griess and the driver of the stopped car were both killed. Officer Griess was a U.S. Marine Corps veteran and had served with the California Highway Patrol for 19 years. He is survived by his wife, two daughters, and son.