It will be interesting to watch to see if this "child of great promise" is subjected to anything close to the maximum penalty for his atrocious actions. I would wager he will claim some outrageous "affluenza" type defense and will be safely ensconced back in his NYU dorm in short order. 
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He is a student at the New York University Tisch School of the Arts.  Quite probably his esteemed attorney will claim the depraved act was performance art and as such is Constitutionally protected free speech.