Alleged drunk driver is stopped while driving slowly down rural road looking for friend’s lake house. Police note an odor of alcohol and allege driver appeared glassy-eyed and lethargic and extremely unsteady on his feet once out of the car. Driver discloses recent knee injury and surgery which may affect his performance on field sobriety tests. Second officer on scene, trained as a drug recognition expert (DRE) observes driver’s tongue to be “greenish” in color which he opines is evidence of recent marijuana consumption. Several empty beer cans found in cooler in car. Defense utilizes booking video and client’s medical records to counter government case. DWI charge dismissed prior to trial.