Not necessarily. During a traffic stop for DUI, while it may seem inevitable that a guilty conviction will occur if you fail a breathalyzer test, that is simply not true. Every person charged with a criminal offense is presumed innocent until proven guilty beyond a reasonable doubt.
When a police officer places you under arrest for drunk driving, you likely feel frustration and confusion. You may feel the urge to argue with law enforcement or represent yourself. However, making these mistakes after a DUI arrest will only make things worse for you.