“It’s been very cathartic making my mental health troubles everyone else’s problem” says man who can afford to pay an entire team to listen to his unhinged rants if he wants.

I would imagine that Columbia’s disciplinary process creates records that are maintained for a number of years. If they weren’t created, or have since been destroyed that would be evidence towards improper procedures. Certainly any destruction now would be highly illegal and might result in a presumption against the university. As to the tenant laws I assume the order that the students received should be proof enough unless New York tenant laws have a carve out for universities.