And where did substance abuse suddenly come from? Is blowing 0.23 now a sign of substance abuse? Am I right in suspecting, AnthonyGA, that you consider even a single glass substance abuse.
Interference with ones occupation it is one of the defining characteristics of alcolhol abuse. The possible physiological effects of this guy's level of intoxication are no more relevant to the discussion than are the possible motives of the individual who turned him in.
Is there a cheap self test kit around
A reasonably accurate breathalyzer can be purchased for roughly $100 U.S. It's not going to save your butt in court but will give you useful information with regard to your BAC after a pint or three.