Don't expect the police to help u remove them, they're too busy..well u know. 

I was a police officer for 28 years (retired Oct 2014) and my wife is a stay at home mom.

The reruns are on all the time.Peter Falk was this disheveled, frumpy, police detective in Los Angeles, working homicide.Columbo always scratched his head have a cigar have this raincoat.

You may have a hard time getting the right insurance on your rental property, or collecting on it if something goes wrong and, say, police report states that involved parties were undocumented4.

I suggest you call the state finance department, suggest that a police officer or regulator go with you and you play dumb on the subject, introduce them as your wife or brother-in-law, neighbor or whatever.

I apologize for probably not wording this extremely well, but for for example if you were a teacher, contractor, police officer, attorney, IT specialist, engineer, etc etc etc...How have you been able to translate or transition knowledge from your previous field into your investing career?

Did you contact the police and file a report?

The house got raided by police for drug use, and I ended up having to ask them to leave.

Since they typically leave pretty quickly once confronted, I haven't called the police...

I doubt they have the resources to police it, but who knows, municipalities have odd priorities.