NEW : Ryan Brunn is sentenced to life in prison without parole . NEW : He describes how he enticed , molested and killed Jorelys Rivera . NEW : Brunn , 20 , says he cut her throat and beat her with a skate . New : His defense team argues that the murder was an accident caused by his addiction to drugs. He offers an apology to her family in court .
NEW : Ryan Brunn is sentenced to life in prison without parole . NEW : He describes how he enticed , molested and killed Jorelys Rivera . NEW : Brunn , 20 , says he cut her throat and beat her with a skate . NEW : He offers an apology to her family in court .