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Kauai Police describe 'GreenLab' training that sharpened officers' ability to detect cannabis impairment

House Judiciary and Hawaiian Affairs Committee · February 18, 2026
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Summary

A Kauai Police sergeant described three GreenLab exercises that tested registered medical patients in controlled settings, improved officers' field sobriety testing and courtroom reporting, and identified nuances between measurable saliva THC and observable impairment.

Sergeant Thomas Koyanagi of the Kauai Police Department described a local training program he helped design to improve officers’ ability to identify cannabis‑related impairment and to prepare testimony for court.

Koyanagi said the GreenLab format brought registered medical patients into controlled scenarios where participants consumed measured amounts (vaporizer,…

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