Philip Davis is charged with attempting to kill a youth services worker . ` Co-workers heard her cries for help and interrupted the assault , '' the district attorney 's office said . Teen accused of killing the female employee in the cafeteria . He is charged with raping and murdering his algebra teacher . He has pleaded not guilty to aggravated rape , assault , murder charges .
Philip Davis is charged with attempting to kill a youth services worker . Teen accused of killing the female employee in the cafeteria . He is charged with raping and murdering his algebra teacher . He has pleaded not guilty to aggravated rape , assault , murder charges .