You might see if a criminal background check can be run to see if the person has a record and if it includes violence or property damage.

So no one rents to criminals etc...Thanks, Matt

criminal) and how you will rate applicants as you start accepting applications?

If anything, he taught me what not to be... a criminal lol. 

Also I was thinking sending letters to all resident including the drug lord unit about receiving criminal activities reports from the residents and now Portland Police has been getting involved into investigation.  

Does your PM have a robust tenant selection process including credit report, criminal background check, employment verification & paystubs, references (going back 2 or more landlords, not the last), etc?

This is a good example of why going forward you make sure all unrelated adults over 18 are qualified individually (I state unless a dependent on another applicant's tax return, but background check still required), and a criminal/background check should have told you he has a current record so would not have been a good candidate for a tenant to begin with.    

They will not only go over a their credit but also their criminal history and judgement history. 

If you sign as a business not actually licensed to do business in your state, even if it seems like some harmless error, could open you up to serious civil liability and potentially criminal liability if you run into a prosecutor having a bad day.Consult an attorney in your state to determine whether to void the check and ask for a new one.

Note that it is a civil action, so check those dockets, not criminal.