WINONA, Minn. – The state will need more police trained as drug recognition evaluators when a looser Minnesota marijuana law goes into effect, says the Winona County deputy Chad Myers. He now is one of only a handful of DREs in southeast Minnesota. Counties around Winona rely on him to evaluate field tests from suspected drug-impaired drivers.  Myers noted the state has only 200 officers certified to determine whether marijuana has been involved in a traffic accident or crime. Not enough, Myers said, noting more use of recreational marijuana can be expected to increase drug-imairment cases. The state will need 500 DREs at least, he said. There are no field tests for impairment due to marijuana, as there are for alcohol, he said.

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MEYRS CHAD WNA DEP drug recognitn evaluator - Winona Journal

Myers. The only certified drug recognition evaluator in Winona and neighboring counties.