The Eagle-Tribune, Paul Bilodeau / AP
Phillip Chism, second from left, 14, from Danvers, sits with his attorneys during his arraignment in Salem Superior Court, Wednesday, Dec. 4, 2013, in Salem, Mass. Chism is charged in the Oct. 22 killing of a popular Danvers High School math teacher Colleen Ritzer. He pleaded not guilty to murder, aggravated rape and armed robbery charges Wednesday. He will remain held without bail.