Hi. I have a question... A friend (actually true) got busted yesterday for cannabis ( drugs) in his system whilst driving ( DUI). Swabbed positive, he was taken for blood, but they were unable to get any, and so, took urine. My understanding of the science is that urine can give a positive well after cannabinoids have left the bloodstream. My question... Will they take this science into account as 'reasonable doubt' or just crush kill destroy as usual?