it was senseless. >> what happened on may 20th, 2010, was something the town of west memphis, arkansas, will never forget. particularly its police chief. >> we're leaving en route to your location. >> there's no such thing as a routine police call. nothing is routine. >> on that day in may, officer bill evans is patrolling the interstate and pulls over a white van with an out-of-state plate. inside are jerry cane and his 16-year-old son, joe. >> the license didn't appear right when he stopped van. paperwork issued was not in order. it wasn't issued by the state. >> instead, the paperwork is issued by the department of heaven, a bit suspicious, evans calls for backup and a second officer arrives on the scene. >> i think they realized that it was up. there was two officers there then, and they were in trouble. >> off camera, jerry cane pushes