Over a year ago I smoked marijuana with my boss/owner of the company I work for. Can he legally come back and ask me to take a drug test to keep my job? I want to add that Marijuana is the only "drug" I use, and that I live in Denver, so it is legal here. But the company I work for is in New Hampshire. I also know that even though it is legal here that an employer can fire you for using marijuana. But can they do so after actually smoking marijuana with you?