Well if all your little bro does is play games I dont think the keylogger got any vital info on him. Just remove the logger and change all your passwords. Little kids dont have credit card info like what this guy is looking for. How do you know it was this guy in the first place and not a buddy or another Hacker? Hell could have been mommy and daddy making sure there child isnt getting into trouble on the internet. I would do that to my kids computers.