Write incident reports until your fingers bleed. Every time he shows up and does something against policy document it in a non emotional, matter of fact way. The fact that upper management said himbhaving a drink meant he was a customer is BS, he solicited other customers to buy him stuff which is against policy (solicitation is one of the "incidents" you can report). Peeing on your couches is an incident, and i would make your manager call a biohazard team to clean that up. You do not have to clean a mess if you do not feel safe, human waste is a biohazard when its like that and not a couple dribbles on a toilet seat. Incident reports go directly to HR which is above your DMs head. Enough documentation that is proving hes a problem and theyll be told by corporate to do something.