---
title: "What role does crash reconstruction play in a DUI accident case?"
description: "Crash reconstruction can drive both prosecution and defense. The State typically relies on the responding officer or a specialist to establish causation, speed, and fault. Defense reconstruction..."
url: https://chicagoduilawyer.net/faq-items/what-role-does-crash-reconstruction-play-in-a-dui-accident-case/
date: 2026-07-08
modified: 2026-07-08
author: "Chicago DUI Lawyer"
type: faq
lang: en
---

# What role does crash reconstruction play in a DUI accident case?

Crash reconstruction can drive both prosecution and defense. The State typically relies on the responding officer or a specialist to establish causation, speed, and fault. Defense reconstruction focuses on breaking the causation chain: was intoxication actually the operative cause, or was another driver, road condition, or vehicle defect the true trigger? Under Illinois law, DUI aggravation requires that impairment cause the resulting injury. The chicagoduilawyer.net brand retains independent reconstructionists on serious accident DUI cases because prosecution reconstruction reports frequently overstate speed, minimize other-party fault, and skip mechanical inspection. Every reconstruction assumption is a testable defense angle.