If you drive a truck for a living, you are held to higher standard -- even while driving your own private vehicle. As a result, getting arrested for a DUI in Arizona is a possible career-ender for those who hold a commercial driver's license (CDL). Many of Arizona's police officers subscribe to a theory of arresting anyone who is driving and may have had a drink, and then letting the crime lab figure out if the person is guilty or not. This may run afoul of the Constitution, but with many local judges backing up these actions, there are no consequences for this type of police behavior. While this is certainly inconvenient and damaging for anyone falsely arrested for a DUI, if you have a CDL, this police strategy may end your career.