I get all the information I need to run their credit/criminal history report myself.

In Washington state, it can be considered a criminal offense to record a conversation without someone's permission. 

., complaints are received about an adult child's criminal behavior.

Some mentioned it above; I would run a full background check, looking more on rental history and criminal, and less on credit (you are adding them to a less that have been approved per your credit qualifications).

I use rentecdirect.com, which charges me $29.45 to run a criminal/credit/evictions search and I check references (employment and landlords) myself IF the reports come back looking good.  

@Ketsana Thepthongsaen-Are you looking for both criminal background and credit checks?

Assuming they have good references and no criminal history, it might be a good idea. 

What if it comes back and he has a criminal background or evictions?

v=9gCCjFbFXn8 Don't forget the last tip: Never carry a gun anywhere, just to make sure you're not accidentally confused with a criminal...

If the guy has the job, references and not a credit criminal, we will put them in Tenant Bootcamp.