I am sorry your mother died , your brother got arrested , someone stole your purse , your car broke down , you lost your job , you broke up with your girlfriend , you are behind on your child support . 

So now if they go back onto the property, they’re actually trespassing and could be arrested as they no longer live there.

If this guy can show strong employment, history of paying his rent, no evictions and no recent arrests then I say go for it!

(It also helped that some woman working at a scrapyard weigh station was arrested by our Sheriffs Department for mis-weighing certain customers.

Those days seem long gone (jail/arrests?)

But it's not really your business if someone is arrested as long as they pay the rent.

So I googled his name and yep, he had 2 arrest records in 2018, one of which was "battery by strangulation". 

I received a hot lead from a motivated seller who wants out of her house for the following reasons:- Seller cannot cover mortgage alone so abusive daughter lives with seller to help pay mortgage (daughter arrested for domestic abuse)- Seller is elderly and medically disabled (low income)Any advice on how to help?

The ex was arrested and charged.

This varies by state and by conviction VS arrest and whether it was a misdemeanor or a felony.