MASS. TRAGEDY

Teen Pleads Not Guilty in Teacher Killing

A teenager charged with murdering his math teacher and dumping her body behind a Massachusetts high school plead not guilty on Wednesday. The 14-year-old student is being held without bail after surveillance video and an interview with the student showed he murdered 24-year-old Colleen Ritzer, according to prosecutors. The suspect is being charged as an adult under Massachusetts law, and could face a longer prison sentence if found guilty.