Most Helpful Guy
No free background checks are a scam. You could cyber stalk him eg. look him up on social networks and public records, etc. but well just don't.
Most Helpful Girl
Nope those always cost. Depending on the site you use depends on the cost as well as how much you want to know. Pretty much if you are willing to spend a few hours on line you may be able to find if they were in jail or such using google.