The lawyer for a 17-year-old Connecticut boy charged with stabbing a classmate to death in school on their prom day says he intends to use an insanity defense . Christopher Plaskon is charged with murdering 16-year-old Maren Sanchez in a hallway at Jonathan Law High School in Milford in April 2014 , just hours before the junior prom . Police are investigating whether it was related to Sanchez 's refusal to be Plaskon 's prom date . Lawyers for Christopher Plaskon , 17 charged with stabbing a classmate to death in school on their prom day says he intends to use an insanity defense . Plaskon is charged with murdering 16-year-old Maren Sanchez , right , in a hallway at Jonathan Law High School in Milford in April 2014 , just hours before the junior prom . Plaskon 's lawyer , Richard Meehan , released new court documents on Monday saying he intends to pursue a defense of 'mental disease or defect and/or extreme emotional disturbance . ' Meehan has said in court that Plaskon was taking anti-psychotic and anti-anxiety medications . Plaskon is due in Milford Superior Court for a pretrial hearing on Tuesday . Sanchez , 16 , was a member of the National Honor Society who was active in drama and other school activities . She had organized the dance herself and was set to be prom queen , her friends said . A witness saw Plaskon on top of Sanchez during the attack and tried unsuccessfully to pull him away , and another saw him discard a bloody knife , according to a police affidavit . Plaskon 's lawyer has revealed that he intends to use an insanity defense for his client who was taking anti-psychotic meds . Plaskon , his clothes bloody , was taken to the principal 's office , where an officer arrived and asked what happened . ' I did it . Just arrest me , ' Plaskon replied , according to the officer . He is being prosecuted as an adult and faces up to 60 years in prison with a mandatory minimum of 25 years if found guilty of murder .
Christopher Plaskon , 17 , is charged with murdering 16-year-old Maren Sanchez just hours before their junior prom in Connecticut in April 2014 . Plaskon 's lawyer has revealed that he intends to use an insanity defense for his client who was taking anti-psychotic meds . Richard Meehan has said he intends to pursue a defense of 'mental disease or defect and/or extreme emotional disturbance ' Plaskon is due in Connecticut Superior Court for a pretrial hearing on Tuesday .