DUI - Arrest

After a traffic stop and any field sobriety tests, the first stage of the criminal process in a DUI case begins when a police officer places the suspect under arrest. An "arrest" occurs when a person has been taken into police custody and is no longer free to leave or move about. The use of physical restraint or handcuffs is not necessary. An arrest can be complete when a police officer simply tells a crime suspect that he or she is "under arrest", and the suspect submits without the officer's use of any physical force. The key to an arrest is the exercise of police authority over a person, and that person's voluntary or involuntary submission.

A police officer may usually arrest a person in the following circumstances:

The Police Officer Personally Observed a Crime

If a police officer personally sees a person commit a crime, the officer may lawfully arrest that person.

For example:
A police officer pulls over a vehicle that is being driven erratically, observes that a driver is behaving erratically, and-- after administering a Field Sobriety Test (FST) and Breathalyzer test-- sees that the driver's alcohol intoxication level is more than twice the state's legal limit for safe operation of a vehicle. The police officer WILL arrest the driver for DUI.


The Police Officer Has "Probable Cause" To Arrest

When a police officer has a reasonable belief, based on facts and circumstances, that a person has committed (or is about to commit) a crime, the officer may arrest that person. This belief, known as "Probable Cause", may legally justify a DUI arrest in certain situations where strong indications of DUI are present, but administration of a chemical test is refused or is otherwise not possible.

For example:
A police officer pulls over a vehicle that is being driven erratically. The officer notices empty beer bottles in the back seat and the strong odor of alcohol on the driver's breath. the officer makes other observations that ultimately lead to the officer having the driver step out of the vehicle and perform FSTs. The officer then makes an arrest based on the observations regarding the driving, demeanor of driver and the performance on the FSTs. The officer WILL arrest him or her based on a probable cause belief that a DUI has been committed.


An Arrest Warrant Has Been Issued

When a police officer has obtained a valid warrant to arrest a person, the arrest is lawful. An arrest warrant is a legal document issued by a judge or magistrate, usually after a police officer has submitted a sworn statement that sets out the basis for the arrest. When issued, an arrest warrant typically:
• Identifies the crime(s) committed;
• Identifies the individual suspected of committing the crime;
• Specifies the location(s) where the individual may be found; and
• Gives a police officer permission to arrest the person(s) identified in the warrant.


Challenging An Unlawful Arrest

At all stages of the criminal process including arrest the officer must not violate the driver’s constitutional rights. The validity of the arrest can be challenged by motion during the criminal process. If the arrest is found to be invalid, the evidence that is acquired after the arrest is tainted and may be excluded from the criminal process.