What is Under the Influence DUI Under 625 ILCS 5/11-501?

Under the influence DUI means driving while impaired by alcohol or drugs regardless of specific BAC levels. This charge relies on officer observations and field sobriety test results rather than chemical testing.

Unlike per se DUI cases, impairment DUI cases involve complex evidence including field sobriety test administration, officer training verification, and subjective impairment assessments. However, these procedures may contain technical flaws and constitutional violations that experienced defense attorneys can challenge to win cases.

The key to defending under the influence DUI charges lies in attacking the reliability of impairment evidence and constitutional violations during arrest.