Driving under the influence (DUI), also known as driving while intoxicated (DWI), drunk driving, or impaired driving among others is the crime of driving a motor vehicle while impaired by alcohol or other drugs including those prescribed by physicians.
With alcohol, a drunk driver’s level of intoxication is typically determined by a measurement of blood alcohol content or BAC. A BAC measurement in excess of a specific threshold level, such as 0.05% or 0.08%, defines the criminal offense with no need to prove impairment. In some jurisdictions, there is an aggravated category of the offense at a higher BAC level, such as 0.12%.
DUI lawyers are criminal law attorneys that assist people who are arrested for driving under the influence charges, in understanding DUI laws and making informed decisions about a DUI case. Since DUI laws are constantly changing, a criminal defense lawyer who practices DUI law also helps to protect the legal rights of an individual facing a DUI offense, often by raising questions about the legality of certain technical aspects regarding specific DUI laws.