Quote Originally Posted by Jaimecbr900
Field sobriety tests is one thing, detection is another.
There ARE field sobriety test that determine recent use of MJ. As I said I have been subjected to a few. The one I remember is where they shined a light in my and told me to look in the other direction, only turning my eyes. I dont have a clue what they were looking for. Look into it if you don't believe me, but I'm not making this up.


THC remains in your body, depending on the users dosage, for up to a month? So, how are they going to be able to prove that THC detected today is not remnants of toking up yesterday or a week ago?
There are numerous ways to test for it, and a hair folicle test can determine the time frame it was used. A piss test is only used to determine use, there are others that yield more results.


How'd they test him for being under the influence of anything but alcohol?

Your boy probably admitted to doing the drug and thereby given the admission of guilt can and does get charged. As explained above, a pee test will only determine if he smoked MJ, not how much nor when.
I don't know what test they used in court, I wasn't there. But I do know that he didn't admit to it and tried to fight it. And again, a piss test is not the only method used to test for drug use.