I don't know about Warshington, but in the background check they try to find out one kind of person you are. Try to stay on the good side many co-workers, also if you are in school try to make a good impression on your teachers and fellow class mates.
College is also a good place to start as well, my advice is to go to college. A criminal justice degree can help you out greatly. If you enlist in the military, that will help you a lot because veterans are both preferred and you get some federal money to pay for your education. You don't have to go active, you can be a reserve. However you will end up out of state for a few months for basic training.
You don't have to be jesus to be hired, but you should make yourself an attractive candidate as possible.