Well he is in a citizens patrol so first of all, what right does he have to follow someone. We had citizens patrols when I lived in Queens. The process is to contact the police if you see something suspicious, period. George was taking matters into his own hands, when he followed the boy and this is a problem if it will be expanded by others.
I do not want to live in a society where armed citizens can follow me because they think that I look suspicious.
He did kill someone. Please do not resort to name calling me. This case is too complex and has much grey area. He should have been arrested because on what basis did he kill this teen. Evidence and all this will be certified in court.