Yeah, cops arrest them? Heh, yeah, they'd rather patrol the 'burb's and write speeding tickets than tackle tough parts of town and get beat up by IAD, their Captains, the Mayor, City Councilmen, DA's and "community organizers" for harrassing da poe black utes!
The owner has to take matters into his own hands and hire armed security to sweep 'em out or they are just going to drive him out. If the latter, might as well pull a Galt and say screw it, let the bank take it in the behind!