Understanding the Importance of Probable Cause in DUI Defense Cases

 Posted on October 24, 2022 in Uncategorized

Police officers are tasked with protecting our communities. However, as with any person of authority, laws exist to direct how and when police officers can use their power. One of these constraints involves the concept of "probable cause." In order to pull over a motorist, a police officer must have a good reason for doing so. If you are facing charges for driving under the influence (DUI), and the officer who arrested you did not have probable cause to pull you over, your case may be dismissed.

Reasonable Suspicion of a Crime

To legally pull someone over, a police officer must have a reasonable suspicion that the person has broken the law or soon will. The term "reasonable" in this context means that most officers of average training and experience would conclude that illegal activity has occurred or is about to occur. In order for a DUI arrest to be legally warranted, it must be reinforced by probable cause. Put another way, there must be some type of evidence that justifies the belief that the driver was intoxicated.

Some of the common reasons police officers pull over motorists and make DUI arrests include:

  • Traffic violations like speeding, illegal lane changes, or reckless driving. A traffic violation of any severity gives police justification to conduct a traffic stop. Some DUI arrests occur after an officer notices warning signs of intoxication, such as the smell of alcohol on the motorist’s breath, bloodshot eyes, and slurred speech.
  • Traffic accidents. Anytime a car accident involves property damage or injuries, the police should be called. An officer may discover evidence of drunk driving while investigating an accident.
  • Poor driving. If a motorist is driving erratically, swerving, driving very slowly, or making sudden and frequent lane changes, a police officer is justified in pulling this motorist over.
  • DUI testing. If a motorist fails a field sobriety test or chemical sobriety test, they will probably be arrested for a DUI. Although motorists have the right to refuse a roadside breath alcohol test like a Breathalyzer, doing so will likely result in an arrest. Refusing a blood alcohol test after being arrested will result in the suspension of one’s driver’s license.

Illegal Stops and Driving Under the Influence Arrests

If evidence was unlawfully obtained by police or prosecutors, a criminal defendant may argue to have it suppressed. The "exclusionary rule" obliges the court to dismiss any evidence acquired after an illegal police stop – including the results of a sobriety test. In some cases involving unjustified traffic stops in which an officer did not have probable cause, the charges against the criminal defendant may be dropped entirely.

Contact an Orland Park DUI Defense Attorney Today

If you are facing DUI charges, contact an experienced Tinley Park criminal defense attorney at Fotopoulos Law Office. Call 708-942-8400 to schedule your free, confidential consultation today.


Probable Cause

Illinois Compiled Statutes

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