Driving under the influence (DIU) means that the driver of a vehicle has taken in or consumed drugs (legal or illegal) or alcohol.  These substances affect a person’s behavior, motor skills and driving ability that can lead to accidents and events that pose a great threat to life and property.

In the US, every state has laws regarding DUI in the sense that operating a motor vehicle while under the influence of alcohol or drugs is illegal.  Before you are even charged with a DUI, law enforcement has to have prove probable cause.  This means that they have to have reasonable suspicion that something illegal is happening before stopped you and questioning you.

One question to ask yourself when you’re pulled over by the police for DUI is if you were lawfully pulled over.  This may be because you’re speeding, have broken tail lights, driving erratically, etc.

DUI law covers implied consent, the agreement between you and the state that if you’re ever arrested for DUI, you have to submit to chemical testing if it is requested by the police.  These laws under implied consent when charged of a DUI varies from one state to another, as do the penalties.  DUI laws also cover search and seizure and the Miranda warning.  This is part of the Fourth and Fifth Amendments which protects you from unreasonable search and seizure as well as questioning without being read the fifth amendment of the constitution.

DUI law also states that investigation begins from the time you were pulled over by the police.  Arrest for DUI occurs after the chemical or sobriety test.