Illinois Forensic Science Commission Criticizes UIC Lab Report on Flawed DUI Test Results

The commission says the university's report fails to adequately address allegations of inaccurate cannabis DUI test results used in criminal cases.

Mar. 13, 2026 at 3:35am

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The Illinois Forensic Science Commission has issued a strong rebuke of a report by the University of Illinois-Chicago (UIC) regarding allegedly flawed drug testing results used in numerous DUI cases involving cannabis. The commission said the UIC report is insufficient and shows a lack of understanding of forensic toxicology. The commission is now recommending a comprehensive independent audit of UIC's Analytical Forensic Testing Laboratory to address the issues.

Why it matters

This case highlights ongoing concerns about the reliability of forensic testing methods, especially in the emerging area of cannabis DUI enforcement. The commission’s criticism of the UIC report raises questions about the integrity of evidence used in criminal prosecutions and the need for greater oversight and transparency in forensic lab operations.

The details

The issues stem from UIC’s Analytical Forensic Testing Laboratory’s inability to properly distinguish between different forms of THC, the main psychoactive compound in cannabis. This led to potentially inaccurate test results being used to prosecute numerous DUI cases involving marijuana. UIC hired a law firm to investigate the problems, but the Forensic Science Commission said that report was insufficient and showed a lack of understanding about forensic toxicology.

  • In February 2024, the UIC lab ceased human testing due to the issues.
  • In May 2026, UIC released an attorney-authored report on the problems with the lab’s testing.
  • On March 13, 2026, the Illinois Forensic Science Commission responded to the UIC report with strong criticism and recommendations.

The players

Illinois Forensic Science Commission

The state commission responsible for overseeing forensic science practices and ensuring the integrity of evidence used in criminal cases.

University of Illinois-Chicago (UIC)

The public research university that operated the Analytical Forensic Testing Laboratory, which provided flawed drug testing results for numerous DUI cases involving cannabis.

Taft Stettinius & Hollister LLP

The law firm hired by UIC to investigate the issues with the Analytical Forensic Testing Laboratory and produce an independent report.

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What’s next

The Illinois Forensic Science Commission is recommending that UIC initiate a comprehensive independent audit of its Analytical Forensic Testing Laboratory’s forensic toxicology operations, with the findings to be made public.

The takeaway

This case highlights the critical need for rigorous oversight and transparency in forensic testing practices, especially as new areas like cannabis DUI enforcement emerge. The Forensic Science Commission’s rejection of the UIC report underscores the importance of relying on authoritative, unbiased assessments of forensic evidence used in criminal prosecutions.