Teen Philip Chism to be arraigned in Mass. teacher’s murder

SALEM, Mass. - A 14-year-old Massachusetts boy is set to be arraigned on murder, aggravated rape and armed robbery charges Wednesday afternoon in the killing of his high school math teacher.

Philip Chism is accused in the Oct. 22 death of Colleen Ritzer, a popular teacher at Danvers High School. The 24-year-old woman was found in the woods near the school with her throat slit and a note reading, "I hate you all." 

According to court documents, Chism robbed Ritzer of her cellphone, credit cards and underwear. He allegedly used a box cutter as a weapon and sexually assaulted her with an object. 

Chism's arraignment is scheduled Wednesday in Salem Superior Court. He pleaded not guilty at his earlier arraignment in District Court. The case was moved to Superior Court after he was indicted last month.

Chism had recently moved to Massachusetts from Clarksville, Tenn.

Police have not released a motive for Ritzer's killing.