Psilocin identified in a DUID investigation

Area of Science:

• Forensic Toxicology
• Analytical Chemistry

Background:

• Driving under the influence (DUI) investigations require accurate identification of impairing substances.
• Emerging drugs of abuse necessitate continuous development of sensitive detection methods.

Observation:

• A urine specimen from a DUI investigation yielded a positive immunoassay result for amphetamines/methamphetamines.
• The subject displayed a lack of response to a severe situation, suggesting potential drug-induced impairment.

Findings:

• Psilocin was identified in the urine specimen using gas chromatography-mass spectrometry (GC-MS).
• The immunoassay showed 1.3% cross-reactivity with psilocin at 50 mg/L, indicating a potential for false positives with certain assays.
• Confirmation of psilocin was achieved without hydrolysis or derivatization, simplifying the analytical process.

Implications:

• This case represents the first identification of psilocin in a DUI investigation by this laboratory.
• The findings underscore the need for comprehensive toxicological screening beyond common drugs of abuse.
• Rapid degradation of psilocin in urine, even at 4°C, emphasizes the importance of timely sample processing and analysis.