Because he was never able to defend his xp winbox against me getting inside his home lan by constantly falling for obvious side channel attacks (I'd pretend to be a girl interested in him, link him to my fake personal blog which was actually full of IE exploits back when they went unpatched for months) I had a lot of time to poke around his home lan and eventually I discovered he was stealing his neighbours wifi for some of the harassment against me so it wouldn't trace back to him.
This neighbour had a VNC port open, which at the time was exploitable so I started it up and enabled my xp backdoor on that system too as another attack vector. The original plan was to start doing some MITM attacks I was just learning about he wouldn't notice while thinking he was untraceable through stolen wifi, but then I got stupid and impatient. Note: I was no master hacker, the exploits I had were merely downloaded off shady forums like shadowcrew. I was an idiot with just enough knowledge to be dangerous at the time.
When he changed ISPs under a new name so I couldn't track him I just logged into his neighbours network where I left the door open and waited for him to connect to the stolen wifi. Re-owned his fresh system with a new permanent backdoor, set up a whole toolbox of spyware, and proceeded to do a bunch of illegal shit under his name like using his card which I had gleaned from a keylogger to buy illegal sex tourist vacations from very obvious fake FBI sting sites so somebody would start monitoring him (i have no idea if they did, I assume they did). Interesting note, when I stole his card, he was using it on his fresh install he thought was secure to pay for a data report on me from one of those information clearing house sites.
The emergency system attack was just using the same VNC exploit. Somebody on shadowcrew discovered they were using it and was daring other hackers to break in which pretty much guaranteed an instant bust if you were stupid enough to do so. This was E911 with admins using printout logs and checking them daily not a restaurant to fleece credit card numbers from where nobody will notice you for a year or so. We all made our own temporary vpns and used disposable sim card dongles and wireless hacking but still you'd be playing with fire screwing with E911.
Naturally this was perfect for what I needed and when I assumed the feds had started watching this guy I accepted the 911 bounty, logged into his system, connected through his neighbors wifi leaving a huge trail of identifying cookie crumbs to follow back to him like opening up his hotmail and yahoo accounts which would've all been logged when they looked at his neighbour for the breach, and proceeded to absolutely trash around their network trying to get somebody to notice and yanked some database tables.
Then I left a nice package of evidence for the cops to find in his system that was poorly hidden, cleaned all traces of me being on his neighbours system, cleaned all traces of me being in his network, and for good measure went online using his browser to attempt to sell the info on every carding forum there was to attract even more authority attention.
When I heard on the same game channel where the troll battle began that the reason he disappeared for almost 3 months was because he was in jail, I gloated my victory like a fool to my hacker friends on IRC who told me from their own experience he was probably looking at being transferred to federal and doing serious time in the double digits, which I could not let happen in all good conscience, even if I absolutely hated this guy so turned myself in figuring since I was underage I could probably slide on my stupidity by transparently admitting to everything and hoping for the best. Thankfully I received the Cosmo of UGnazi crew sentence and not the Kevin Mitnic solitary confinement revenge sentence.
Now when I google my name I just see the crazy baiter troll battleship nonsense he's written over the decade in my name with obvious references he knows I would understand to let me know it's him and to pick up where we left off. There's a hundred posts the latest one was Sep 2012.
Also, kudos for clearing his name of the stuff you did on his behalf. That shows some real strength of character, IMO.