the teacher's eye. >> after the teacher is taken care of, doug estle starts the investigation into who could have done this. several years earlier murphy high school installed an elaborate system of surveillance cameras for security purposes. they have used it in the past to catch petty thieves and late-night break-ins, but this is the first for an assault of this magnitude. >> a couple of my assistant principals went to the camera room and immediately started backing it up and take a look at who it was. we also had students already in the hallway who identified both young men. >> and because of the tapes and the student identifications, the police were able to apprehend the suspects quickly. mobile district attorney john tyson. >> well, the tape speaks for itself. we have two young men who are in on it. one is to take photographs. the other is going to actually accomplish the assault. and we can clearly see, as the teacher walks out, that the