I was recently trying a DUI / Drunk Driving case in Torrance, California. During one of the breaks, I was speaking with one of the arresting officers. He indicated that in this bad economy, it seems more people are driving with expired license plates because they don't have the money to keep them current. Driving with expired license plates is a sufficient basis in which to stop a driver. Obviously, these types of stops can lead to more DUI / Drunk Driving investigations and arrests. It won't matter if the driver is otherwise not violating any other traffic laws. The stop and subesquent investigation and/or arrest and possible DUI / Drunk Driving conviction can be even more devistating.