You really think I can't deny a loan for an unemployed criminal?

No offense but I assume you don't have any loss prevention training or experience, and I assume you won't want to take on liability if something in my house does go missing while you show it. 

I have a clause in my lease that states criminal activity is grounds for eviction and does not require conviction in court.

Have solved two criminal cases and caught the garbage man dumping out a television onto the ground and leaving it.  

I own rental property and that is absolutely criminal!  

This time when I chose the tenant I followed the screening process carefully, looked into their past (criminal and credit), reviewed as much about their lives as possible.

No criminal background or activity.  

No offense meant but your job sounds a bit like a MLM gig.

Their criminal records?

For example, landlords  focusing on Section 8, low income or students (without much credit history)  may lean off the credit (which is likely to be lower/nonexistant and use the cosigner and focus on government portion of check) but focus more on another ingredient, like criminal background and rental history.