I think he went back and forth in high school. He won a state championship in 2002 with the high school and then graduated from Wisconsin in 2006 (at least that’s the timeline I saw), so I figured he did both at the same time.
A friend of my brother did that, went to Detroit to play for a year or two but always came back to finish out the school year at the high school. To make his life even more complicated, he sometimes went to the Catholic hs but played hockey at the public hs.