If drugs are an issue he can try to get the guy arrested off site especially if he knows  where he is selling stolen property or if he has drugs on him.

I've heard too many nightmare stories about an owner only finding out about uncured city violations only after a warrant was issued for their arrest.  

Does he have an arrest or conviction? 

We were checking arrest, hospital, and death data, he was just gone and we never figured out what happened.  

On the other hand, if YOU complain to the housing office that the tenant is dealing drugs, or got arrested, or busted out some windows...they might just as easily, and at their discretion, throw the Tenant off the program.

She fell behind because she was arrested for parking tickets.

Quote from @James McGovern: I ran across an investor whose strategy is to taunt tenants on eviction day to encourage them to make emotional decisions that get them arrested.

She was arrested for placing purchase and sale agreement for stopping foreclosure properties. https://www.nbcdfw.com/news/local/texas-mortgage-fraud-schem...I would be wary of doing those tactics, but I would happy in learning more about you stop the foreclosures, DM me if you want to talk. 

They know who [the scammer] is, and I'm not quite sure why an arrest has not been made,' Haskell said.

If they arrest her you can just call the unit abandoned and take it back.