This guide is designed to help merchants and retailers partner with local law enforcement to assess their auto theft, car break-in, and vehicle vandalism problems and to develop strategies to address them. The guide walks readers through the process of understanding their car crime problem; collecting crime data; identifying potential strategies; and measuring the impact of those strategies. While each jurisdiction's problems will be different, effective strategies may include introducing bike patrols, improving lighting, restricting pedestrian traffic, and requiring tickets to both enter and exit parking facilities.