@Daniel Pitta In my opinion Background checks are the number one best way to vet a prospective tenant.Many things fall under background checks like calling their employer and previous landlords.Also I know some PM's that like to sneak and peak in their car and see if is junky, if so they is likely how they will treat your property.Also these same people will find an excuse to stop by their current residence and look in the door for the same reason.W-2 paycheck verification.No evictions in last 5 years.Tenants make 3x the rent.If they can't come up with all move in money don't rent to them.They ones that beg and plead for you to rent to them you should run from.Make sure they have stable employment - same job or in same field for 2 years or longer.Get a larger deposit than 1 months rent to encourage them to give you proper notice when they move and that they don't try and use deposit as rent when they move out and that they also leave your property in good condition.

Kick her out if she is guilty.

It is designed to protect the innocent and as a byproduct, the guilty get some extra time. 

Granted, it's a lot cleaner deal if you go through them and, personally, I feel guilty buying an occupied dwelling at a tax sale, but still, plenty of folks do it, so I was just wondering. 

I'm just as guilty of it when I figure why not get a few more things when at the store and get a larger amount of cash back, rather not spending the money in the first place. 

@Virginia Hellen  Be careful about paying because it might make you look guilty.

I assume router and table saw at min. 3) Ehem, I plead the 5th.

Best case of action if he pleads the case to her to sell so it stops dining his credit. 

What "illegal act" are they guilty of?

(From time to time, I am unfortunately, guilty of this.)