Christopher Plaskon , 17 , was charged with murder as an adult in the slaying of a classmate . Maren Sanchez , 16 , died after being stabbed in a school stairwell on April 25 . Comment:
Christopher Plaskon , 17 , was charged with murder as an adult in the slaying of a classmate . Maren Sanchez , 16 , died after being stabbed in a school stairwell on April 25 . Plaskon 's lawyer says his client is considering a possible mental health defense .