He will be tried as an adult. All seventeen year olds in Wisconsin will be handled by the regular justice system. To paraphrase a post I made elsewhere, a conviction is far from a sure thingin this case. As long as the first shooting is not on video, this kid will claim he was attacked, feared grave bodily harm and iced someone. He will then say he fled to surrender to police, was attacked again and shot in self defense once more. The real kicker is what happened before video is rolling. If the defense is able to muddy the waters he wont be convicted.