Return of the Turnabout

Basically, a man was found dead in an alleyway, and your client is a 18 year old. Except that person is actually the killer, albeit accidentally, and the person who introduced you to your client is trying to manipulate the case in order to get himself declared guilty to protect your client. Also, this guy tries to make himself seem as unlikable as possible to make you WANT to get him declared guilty. However, he's actually a very nice guy who made friends with the client, but unfortunately he wants to go to prison not only because he wants to protect his friend, but because his life was ruined by a case where he was the innocent defendant, and he got off via a technicality, so a lot of people still think he's the culprit, so he'd rather be in prison then be homeless. And he does everything in his power to get there and to help his friend be off the hook, even by watching previous trials and working from there. And your client is actually an extremely nice, sympathetic character as well.