Tell your friend to get a good lawyer and make it go away. This should not be difficult. Also, I have to add that if was caught doing this once, he may have not been caught doing this other times. Have a heart to heart with him and if is prone to this behavior, get him into counseling before he ruins his life.
Not being judgemental, just offering advice on how to help your friend. He should not apply for any job requiring a background check until this is resolved.