. >> chad was angry with ta ang sanitation.o deal harshly with who have done with it. >> he was angry about it. >> angry enough to kill. >> we don't know chad hallway very well yet. we get to know him. >> what detectives call getting to know you does not seem so friendly when you are a potential suspect. >> i was under the impression that before they talked to me, they were so convinced i did this. they came up and asked a lot of questions. >> detectives already learned something important. the misconduct allegations had been thoroughly investigated by law enforcement and found to be completely baseless. but the detectives also knew a false allegation could be a very good motive for murder. that's one of the worst things that a teacher or instructor can do to a kid. it's also one of the worst things to be accused of you didn't do it. >> that was probably the scariest thing. a lot of things happened in combat, i never in my life have been that scared. >> scared and he admitted angry. i was beyond mad. i can't even describe how a