And the husband had some significant criminal issues in his 20’s and 30’s, 20 years ago now.

That is just the criminal penalty, then you could have civil liabilities on top of that.

Criminal Charges are on the menu for Maumee landlords. 

It sounds criminal as you weren't aware of anything.

That there could be criminal action and possible jail if someone does this?  

I have been using tenantreports.com - options for different packages (credit, criminal. eviction as you choose), plus options for the applicant to input the information or the landlord to input the information.

They also allow you to choose from several screening options, such as - credit, criminal and eviction; based on your preferences. 

And even then if he did something criminal then insurance and asset protection are not going to help him.. you can't put an LLC in jail.

I suspect they’re fairly poor at the moment (I realize that everyone makes their own choices in life), but adding a criminal record if it can be avoided seems unnecessary.

Depending on an offender's criminal history, this information will include either the address at which the offender resides or the community of residence and ZIP Code in which he or she resides.