Police respond to multiple 911 calls of driver weaving across highway lanes and finally crashing into inside guardrail and snow bank. Police find driver outside of damaged car trying to re-enter vehicle and leave. Driver is reported to be confused, lethargic and argumentative, but there is no evidence of alcohol impairment. Police suspect, based on driver’s pinpoint pupils that he is impaired by some controlled substance. Defense files Motion in Limine to exclude any unfounded opinion evidence regarding impairment by any substance, other than alcohol. Government did not disclose an expert witness qualified to state such an opinion. Prosecution agrees to dismiss OUI Drugs Charge on trial date.