I'm a semi-regular poster on this forum but created a new alias for the purpose of this discussion. So a colleague of mine apparently has been showing up to work under the influence of drugs (not marijuana). The students picked up on it as well as many staff members. Administration saw it themselves too and as of right now no one is sure if this person can or will return. Please note that they can't drug test this person, as stated in the union contract, so other than blatant observations of off behavior no one can officially say the person is on drugs. So here's my question, What would you have done if you noticed? Has this ever happened to anyone before?