(CNN) -- Philip Chism, a 15-year-old Massachusetts boy accused of raping and killing his math teacher in a high school bathroom, was arraigned Wednesday on attempted murder charges stemming from a separate attack on a female youth services clinician. Prosecutors laid out a narrative of what they said was "the defendant's intent to murder" a female employee last month at the Dorchester Department of Youth Services facility where Chism is being held pending trial, the Suffolk County District Attorney's Office said. A judge set bail at $250,000 and ordered Chism to not have contact with witnesses, including the victim. He is to appear in court September 19 and an automatic "not a youthful offender" plea was entered on his behalf.
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Philip Chism, 15, accused of attempted murder in assault on youth services worker
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In another case, teen is charged in rape and killing of algebra teacher Colleen Ritzer
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Prosecutors lay out narrative of what they said was "the defendant's intent to murder"
Philip Chism
Chism
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Philip Chism
The victim suffered bruises to her face, jaw and head, along with a scratch on her back consistent with a tear in her shirt that appeared to be from the pencil @placeholder carried, according to the statement.
Colleen Ritzer
Police said he was carrying credit cards and a driver's license belonging to @placeholder, as well as a pair of women's underwear.
Colleen Ritzer
Police discovered @placeholder's body in a wooded area near the school, covered with leaves and debris in an apparent attempt to conceal it, court papers said.