Simulating a roadside investigation of a potentially intoxicated driver, Robin Rocke, left, the Drug Evaluation Classification Coordinator for the Colorado Dept. of Transportation, evaluates the

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Simulating a roadside investigation of a potentially intoxicated driver, Robin Rocke, left, the Drug Evaluation Classification Coordinator for the Colorado Dept. of Transportation, evaluates the assessment skills of a state trooper using a flashlight and so-called pupilometer as he undergoes a several week long Drug Recognition Expert class, at the Colorado State Patrol Training Academy, in Golden, Colo., Thursday March 6, 2014. The ongoing training is happening as Colorado struggles to keep accurate statewide records on marijuana-impaired drivers, with state police chiefs saying they need more money to train officers in recognizing stoned drivers. (AP Photo/Brennan Linsley)

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Associated Press
Fri, Mar 7, 2014 12:40 PM EST