I suspect my step son is smoking pot but dont know for sure. Sometimes there is a smell about him which is like cigar smoke only I know it isnt cigars. It isnt cigarette smell either. The smell seems pleasant and aromatic. Could it be pot? Confrontation gets nowhere. Behavior wise he is always disappearing to remote corners of the garden and sometimes is in an exalted state over nothing. One time I had placed a sieve like filter over the bathroom sink drain and found tiny brown grains in it. Fool that I was I wondered if it was small dead brown ants or something like that. Now I remember that all grains were equal in size. I asked my stepson what they were (was genuinely puzzled) and he seemed to get angry at the mere question, ran the tap and drained it off and brushed off my question. Is hash or marijuana grainy and brown in color? Any feedback would be most appreciated. Thanks.