My wife and I are originally from Delaware County(Delco) PA, where we both still work as police officers. 

I chose the triplex because it was right across from the police station, within walking distance to a CVS and other local shops, and basically right downtown in a small city, but it sits in a very quiet neighborhood.

I had to show up at the property, call the police, tell them someone broke into my property, showed them proof that I owned it, said I wanted to press charges.

My brother was actually a police officer in Lansford for several years.

Best protection is to get a police report.

I'm calling the police. 

All you need is knowledge there are children in the home in case there's an emergency and police or fire need to know who occupies the rental.

The PM suggested client to make a police report, but I think it’s irrelevant.

Call the police and they will usually make the owner let you in.

Again, this is all based on my personal observations and not supported by any market analysis :) We like to purchase small single family homes that are 2 or 3 beds and 1000 sq ft or less, and our tenants are responsible, young professionals and tend to have stable, service-related jobs (nurses, police, military, etc).