If you have been arrested for a criminal offense, especially if you think you are innocent, you may assume that all you need to do is show up in court and tell your story and the problem will take care of itself. Unfortunately, your innocence or guilt isn't always the determining factor in whether you are convicted and what penalty you will receive. That's why you need a criminal lawyer to help you through the maze.
The 4th Amendment of the US Constitution protects US citizens from unlawful search by requiring probable cause. But in 1990, the Supreme Court ruled in a 6 to 3 decision that the danger of drunk driving far outweighs the small intrusion of DUI checkpoints for sober drivers. Thus, the Federal Supreme Court ruled that DUI checkpoints are constitutional, and thus are a legal form of law enforcement.
State DUI Checkpoint Laws