Ithaca DWI Lawyer: Recreational versus Therapeutic Drug Dose and DWAI

DRE = Drug Recognition Evaluator

I just came back from Tucson, AZ where I attended a DUI conference on DWI and DWAI drugs cases. One of the main speakers Dr. Fran Gengo (University of Buffalo) spoke on DRE (drug recognition evaluation) as well as Driving While Impaired by drugs. Now Dr. Gengo is a pharmacologist and understands toxicology at a high level.

How drugs are dosed, metabolized by the body, and can potentially impair a driver is complicated stuff. Now the DRE and the drug recognition evaluations used by the police have many issues. Can a law enforcement DRE officer using a DRE (yes, the person and the exam) tell you are New York DWAI drugs?