You should have it published exactly what your criteria for a tenant are- credit score, income, criminal history, etc, so anyone who inquires should already have a good idea if they qualify or not.

Before I take an application I tell the person I am going to do a full criminal and credit check.  

Just tossing out (with fear of getting mauled :) I find most of the educational courses are not criminal or unethical.

Yeah, we picked a winner (we actually thought they were great at first, with no criminal records, and fit our strict criteria).  

Your first order of business is to establish uniform application, credit and criminal background check on everyone there. 4-Request rent payment history for the past 1-2 years.

If you fight it they will bring criminal charges that could include federal drug charges, money laundering, RICO, non RICO conspiracy.Step 4. 

I don't focus as much on crime because criminals have cars to and drive to the good areas to steal ac condensers also. 

Such an action would have many implications as criminal, and then the suites, all the suites.     

Failure to follow these rules can lead to fines or even criminal charges as I understand it.

If nothing else, search your states criminal history and court records databases, those are usually cheap or a few bucks.