After a driver is pulled over and before he is officially arrested for driving under the influence (DUI), an Illinois police officer conducts an investigation. During this investigative period, the officer tries to determine whether her probable cause is strong enough to justify arresting the driver for a DUI.
An Illinois police officer will typically conduct one of two investigative tests after pulling over a driver for suspicion of a DUI. An officer may conduct a field sobriety test a portable breath test, also known as the “Breathalyzer test.” During the field sobriety test, the officer asks the accused to perform a variety of actions that illustrate the accused’s level of mental and motor control. Requested actions may include following the officer’s fingers with one’s eyes in a horizontal motion, walking the line and being asked to turn abruptly, or standing on one leg.
During a Breathalyzer test, a machine measures the accused’s blood alcohol content. The legal blood alcohol limit in Illinois is .08 percent. According to Illinois law, drivers have a right to refuse one or both of these tests. However, a decision to refuse such a test might not be the best option in all circumstances.
...