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 . Comment: Authorities say he killed his math teacher at school , then disposed of her body .
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 .