Due Diligence - Lending Background Checks

AVP at a bank ($1.5BUSA)
Hello all - 

Wondering if any of you run background checks, or enhanced Google searches of your lending applicants? If so, would any of you be willing to share your guidelines on what you consider a disqualifier? We attempted to start with the SBA SOPs but they weren't very helpful as there wasn't much detail outside of have you been convicted previously or arrested in the past 6 months. 

Thank you,