In most cases, a DWI citation begins with a police officer spotting a driver who seems to have difficulty controlling the vehicle they are driving. The first signs of someone who may receive a DWI charge might include swerving, causing near accidents, irregular speed either high or low, and in extreme cases, wrecking their car.  If a police officer pulls someone over who is exhibiting the aforementioned signs, they will make the determination whether or not to charge the person with a DWI citation. They will go forth with the charge if they feel the driver is breaking the law.