DUI (Driving Under the Influence) trials in the U.S. typically follow a structured legal process where the defendant is charged with operating a vehicle while impaired by alcohol or drugs. The process begins with an arrest, followed by an arraignment where charges are formally presented, and the defendant pleads guilty or not guilty. If pleading not guilty, the case moves to pretrial motions, discovery, and potentially a trial. During trial, the prosecution must prove beyond a reasonable doubt that the defendant was driving, under the influence, and that this led to impairment or an unlawful BAC level. Defenses might include challenging the legality of the stop, accuracy of sobriety or chemical tests, or presenting alternative explanations for the defendant's condition. Outcomes can range from acquittal to conviction, with sentencing based on the severity of the offense and any prior convictions.