mr. parker did plan the attack. thought into it because he hit there right at the end of the day. >> it's 2:15 and class is letting out. unbeknownst to parker and harris, the school's surveillance cameras capture the entire incident. >> through the eye of the camera you'll see the whole thing. you'll see parker get behind her door. and as she was walking out of her door right at the end of the day, now there were students in the hall. he just took a running start, and he hit her with everything he had. >> parker drives a vicious blow into the side of the teacher's face right above her eye. she falls to the ground, and he takes off running down the hall and out the building. students immediately come to the teacher's aid. she gets up from the floor and sits down, holding her head, clearly in pain. principal doug estle is called to the scene. >> over the radio, i heard an administrator is needed upstairs. and, of course, we know when we get the call on the radio an administrator is needed. we all go. we get there, and