Driving under the influence may result in significant penalties in Illinois, including driver’s license suspension, mandatory alcohol education classes, and in some cases, even jail time. DUI penalties are especially severe if there are certain aggravating circumstances present or it is not the defendant’s first DUI. If you or a loved one was arrested and charged with drunk driving based on the results of a chemical blood alcohol content (BAC) test, you may wonder if these test results may be disputed.
Contesting the Result of a Breath Alcohol Test
In Illinois, a driver is intoxicated “per se,” or automatically considered to be intoxicated, if his or her blood alcohol content is 0.08 percent or greater. Most police officers carry a portable breath test often referred to as a breathalyzer. These preliminary tests are typically used to establish probable cause for the DUI arrest. However, the results of a preliminary roadside BAC test alone are not enough to secure a conviction. Usually, after someone is arrested for DUI, they are issued a secondary test at the police station. These evidentiary tests are considered to be more reliable than the roadside test. However, several issues can cause a BAC test to be inaccurate, including: