But this poor fellow consumed weed, as in consume as a synonym for eat. So he ingested the stuff as in eating a hash brownie which was quite possibly made from Afghan Black or Lebanese Blond? That might put a completely different complexion on the situation? Is the drug absorbed into the lining of the gut or the stomach or is it excreted in the normal evacuatory process? I understand from the UK medical department at the Beehive that six weeks for hair is the norm. The point of reference is, as for arsenic, the root of the hair so in order to avoid detection along that route, complete depilation would be necessary which is both extremely painful and expensive.