when can voluntary intoxication be used as a defense
Intoxication defense In criminal law, the intoxication defense is a defense by which a defendant may claim diminished responsibility on the basis of substance intoxication. Where a crime requires a certain mental state (mens rea) to break the law, those under the influence of an intoxicating substance may be considered to have reduced liability for their actions. With regard to punishment, intoxication may be a mitigating factor that decreases a prison or jail sentence. Numerous factors affect the applicability of the defense.
Alcohol laws of Texas An operator of a motor vehicle is considered under the influence of alcohol if a chemical screening test shows a blood-alcohol content of 0.08 percent or higher. No other evidence (such as Field Sobriety tests) need be presented to the court to obtain a DUI (driving under the influence) conviction. A driver testing 0.15 percent or more over the legal limit of 0.08 percent faces more severe penalties for enhanced BAC. When under the age of 21, a driver in Texas must not test positive for any blood-alcohol content (BAC) and may be charged with DUI even if the amount tested is under 0.08 percent.