Philip Chism, 14, Charged with Death of Teacher Colleen Ritzer in Danvers, Mass.

Second murder of teacher by a student this week ...

Philip Chism, 14, pleaded not guilty to the charge of murder of Danvers, Mass. school teacher Colleen Ritzer, and was held without bail as his defense attorney argued for the proceedings to be closed and her client to be allowed to stay hidden because of his age [...]

Chism's defense attorney, Denise Regan, who declined to comment outside court, wanted Philip Chism tried as a juvenile [...]

Large amount of blood discovered in a second floor bathroom at the school where Chism was a student, then Ritzer's body was found in a wooded area behind the school  [...]

CNN's Don Lemon reports on a 14-year-old who has been charged in the death of a math teacher in Danvers, Massachusetts.