After a Washington motorist is stopped and arrested for suspicion of DUI-Marijuana, the arrest is justified due him having a "Green Tongue." KISM morning hosts gave me a call the morning this story broke and we discussed the reality of a Green Tongue. The phenomenon has become well known among law enforcement, due to the creation of the Drug Recognition Program, a program that trains and certifies Drug Recognition Evaluators (DRE), and it is also said to be a clue in Advanced Roadside Impaired Driving Enforcement (ARIDE). Students of both these programs are told to look for this clue.
HOWEVEVER, the elusive 'green tongue' in the DRE Instructor manual focuses on this, next to bullet "c" under the instructor notes where they admittedly state:
"Point out to students that there are no known studies that confirm marijuana causing a green coating on the tongue." (Session XXI, Page 6).
SO law enforcement seeks to have it both ways, tell the world it exists, tell the world that based on your training and experience there is a green tongue associated with smoking marijuana, but, yet, at the same time, tell students, that it has never been proven! In this short seven minute radio interview, the truth of the green tongue is disclosed - IT DOES NOT EXIST.