This seems to be the comicbook thread, so... I've been trying to remember a comic I read, or a graphic novel as I don't think it was published in loose issues, it took place in American contemporary society and followed one guy who's brother was got the powers of god and turned mad.
The theme of it is similar to the middle part of the manga version of Akira where Tetsuo is a living god ruling over neo-tokyo, those who have read it know how fucked up that shit gets, this is similar to that if I remember it correctly.
edit: dangit, replaced comic book with "graphic novel" in google and it might be "A God Somewhere"
edit2: yep, that's it, started reading it to find out if it was the right one and I'll probably finish it, it's good,