I am sure it is partially to blame, but I don't know if I'd let the kid off of murder.
I do think, however, that his lawyers should appeal and try to try the case with him as a minor. At least that would give him some protection, and possibly less than a 30 year sentance.
As always- None of my statements are evaluated by the FDA.
My advice is not intended to diagnose, treat, cure or prevent any diseases unless prescribed by a health practitioner. All information is provided for educational purposes only and should not replace the advice of your medical doctor.
(but your medical doctor will probably end up killing you