Potential tenant charged with sexual misconduct with minor child

n Alabama.. I have a potential tenant and did my due diligence,  ran this potential tenant through rentprep.com for a tenant screening.  Shows credit, ok, shows judgments, payment history and says NO convictions.

For kicks and giggles, I googled him a few minutes ago and BAM, he was charged  with sexual misconduct with a minor child in March 2018.  He did go through a divorce a year ago.  He mentioned to me that it wasn't pleasant.

The online screening service did not show any convictions.  So now I'm torn on what I should do. We are suppose to sign a lease tomorrow morning at 10:30am.

He has not seen the lease yet, can I add something to the agreement that felony convictions during the lease agreement are cause to terminate the lease?  Is that legal?  

I fully realize this could have been a vindictive wife who filed charges that were bogus...but I don't know that.  It is too late to call the county to get information.

What advice do you have?  I sure as hell wish I had googled his name before today....