Trial Tactics
Accident Reconstruction in DUI Injury Cases: Challenging Causation & Driver Identity
Legal Counsel Review: Senior DUI Trial Attorney & Forensic Specialist•Published: September 2, 2026•Statutory Jurisdiction: State & Federal Courts
In felony DUI prosecutions involving traffic collisions (California Vehicle Code § 23153), prosecutors must prove beyond a reasonable doubt that the defendant's unlawful driving act was the proximate cause of the collision and resulting injuries.
1. Forensic Evidence Utilized by Reconstruction Experts
- Event Data Recorder (EDR) Black Box Downloads: Captures throttle position, vehicle velocity, brake application timing, and steering angles 5 seconds prior to impact.
- Kinematic Collision Analysis: Calculates vehicle momentum vectors, post-impact trajectory, and principal direction of force (PDOF) from crush deformation measurements.
- Environmental Roadway Audits: Evaluates sightline obstructions, broken traffic control signals, inclement weather hydroplaning, and other roadway hazards.
| Reconstruction Finding | Forensic Evidence | Legal Defense Defense |
|---|---|---|
| Other Driver Ran Red Light / Failed to Yield | EDR Speed & Traffic Signal Timing Logs | Defeats criminal causation; DUI injury charges reduced or dismissed |
| Vehicle Mechanical Failure | Pre-Crash Brake / Steering Failure Inspections | Establishes unexpected mechanical breakdown as sole cause of collision |
| Disputed Wheel Identification | Airbag DNA swabs & Seatbelt Bruising Patterns | Proves defendant was passenger, not operator of the vehicle |
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Authored & Verified by Duiattorneysonline Senior Trial Counsel
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