Leased tenant moved out and left keys with bunch of hooligans

[Gaurav Raj]

Hello Everyone-

I recently purchased two rental 4-plexes. Today I came to know from tenants that one of the guy has moved out sometime back and there are still multiple folks come and go all the time. There are suspected for taking drugs, partying in night and stealing stuff including electricity from neighbor, apparently electric department has disconnected their electricity for some reason. These folks have caused a water damage and downstair roof has crashed down in the washer/dryer room. I heard they have been paying the rent though. Person on lease is not accessible, as his/her phone is not in service anymore. What would you guys advice for a right approach to get them out of my unit without me getting into any safety or legal issues.

Thanks a bunch for your insight!