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 ambush is on, and he throws a haymaker and floors the teacher right there in the hall. >> randolph parker is charged as an adult. he pleads guilty to felony assault in the second-degree and is sentenced to three years in prison. as for the claim that he was wearing brass knuckles -- >> we were never able to prove brass knuckles. he has a reputation for having brass knuckles, but we couldn't prove it in this case. >> as for dominic harris, the second student with the cell phone camera, his trial is pending. >> i think the arrest and conviction and sentencing of the first young man here probably sends as loud and strong a message as can be sent in this