my dad said hes gonna drug test me, and hes a cop. so what kind of test do u think he will use, since hes a cop, do you think he can get free access to different types of tests, or he'll just buy a take home kit? if its a home kit, for up to how long can weed be detected in these? and one more question: will he be able to test for other drugs with the same kit, or will other drugs change/do anything to a weed test? Thanks.