You could search Zillow for off-market properties. Look for stuff that's way below market for the area. Cross reference state property tax records. Title records. Maybe it's boarded up and in obvious disrepair. Particular look for one that's owned for a long time by an LLC. The owner there has enough business accumen to fix it up, but believes that he'll profit more by waiting around until market conditions change. Look for the LLC owner, for one who doesn't live nearby. Now you have someone whose distance and dereliction of social duty shows through in the condition of the property. He's harming the neighborhood, keeping housing empty and off-market, and not even paying attention. That's the one.

This is not legal advice, just a mental exercise.