Inform the tenants that due to security concerns the common areas will now be under surveillance (maybe check with a real estate lawyer to ensure that will hold up in landlord/tenant court) and then see what you see. 

I appreciate the info in all, hey if you need a surveillance system or fire alarm, or building automation, Intercom System....that's my field. thanks again.

I might add that you should install surveillance cameras in case he comes back and does damage to the property or threatens you etc.

HD video surveillance?

Small (cyber) world lol.

The appreciation you see around the fort is likely due to the military increasing the size of the cyber command in the area.  

Hides behind Google and Yelp to feel better about their cyber bullying.

Built your Future not your Closet.Use your time and money wisely.Instead of shopping for unnecessary products this Cyber Monday, invest in Real Estate.You will thankful in the future!

Many if not most publicly recorded documents will not accept PO boxes, postal annex addresses, cyber space addresses, etc and require some sort of real property address.

Joe,This strategy would certainly work if we were looking to protect liquid assets (stocks, bonds, cds, etc.) that really exist in cyber space.