Nick Place and Kevin Burke As marijuana gains mainstream acceptance, the average cop on the beat more than likely hasn't kept up with the evolution of cannabis over the past ten years. Taught by veteran DRE instructors, 420 4 Patrol is an 8-hour class designed to get patrol officers up to speed in this dynamic legal and social environment. We will cover different types of cannabis and paraphernalia, roadside field sobriety testing, interviews and interdiction, cannabis impairment, the endocannabinoid system, the legal environment, and more. Cannabis popularity and acceptance will only increase, it's imperative law enforcement learn more about cannabis before full legalization is the law of the land.