( CNN ) -- After Massachusetts teen Philip Chism pleaded not guilty to rape , lawyers on Thursday discussed whether he should be treated as a juvenile on that count or as an adult , as is the case for the murder charge he 's facing in his teacher 's death . Dressed in a dark sweater over a tie and button-down shirt , the 15-year-old Chism looked ahead but did not speak during Thursday 's hearing in Salem . After his lawyer waived a reading of the new charge , a not guilty plea was presented on his behalf on an additional rape charge on which he was indicted last Friday . Kate MacDougall , a Essex County District Attorney 's office prosecutor , did not ask for bail on the new charge , given that Chism already is being held . That indictment came down three months after , authorities say , Chism killed Colleen Ritzer , 24 , his math teacher at Danvers High School . Police say Chism used a box cutter he 'd taken to school to kill Ritzer on October 22 in a girls ' bathroom at the school . He pleaded not guilty to aggravated rape and robbery , as well as for murder -- for which he 's set to be tried as an adult -- in December . The additional count of aggravated rape came in the form of a youthful offender indictment . The difference between or circumstances surrounding the two different rape charges was not immediately clear . The prosecutor , defense attorneys and Judge Howard Whitehead talked about whether Chism should be treated as a juvenile on this new charge or as an adult . `` It 's an open issue , '' said Whitehead , later asking both sides to submit their views to him in writing by March 1 . In addition to this discussion , MacDougall noted that a `` substantial '' amount of new material related to the investigation was being provided to the defense . Among other things , this included extensive surveillance imagery tied to that tumultuous fall day in Massachusetts ' North Shore . The judge set the next court date for the afternoon of April 7 , noting that a pretrial hearing on the case should take place `` sometime in late May or early June . ''
Philip Chism has a not guilty plea entered on his behalf on the additional rape charge . It 's not clear whether 15-year-old will be treated as a juvenile or adult on this count . He previously pleaded not guilty to aggravated rape , robbery , murder charges . Authorities say he killed his math teacher at school , then disposed of her body .