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Teen teacher killer escapes supervision and attacks caregiver

BOSTON — Prosecutors have asked for strict security for a Danvers teenager charged with killing his teacher after he allegedly attacked a female youth worker this month.

In court papers released Thursday at the request of The Salem News, Essex County prosecutors said 15-year-old Philip Chism slipped away from caregivers before the June 2 incident at a youth facility in Boston.

Prosecutor Kate MacDougall said Chism crept along a common hallway “crouched down out of view,” followed the woman to a locker room and tried to choke her while holding a pencil. Other workers came to the woman’s aid when she screamed.

Chism is at Worcester State Hospital for evaluation.

Chism pleaded not guilty to robbing, raping and killing 24-year-old Danvers High School teacher Colleen Ritzer after following her into a restroom last October.