range. execution style. all this, led investigators to think that this could be an organized crime hit. rumors are sweeping the town. talk of mexican drug cartels and prison gangs. we are open to every avenue right now. reporter: nbc s channel five in dallas covered the case from the beginning and the reporter ken kaltoff was there for it all. mexican drug cartels were suspect immediately because he had been involved in drug cases over the years. reporter: and investigators also suspected another group. less publically known but very dangerous. the arian brotherhood of texas. a prison gang of white supremists. why was this a group that b group that may have done this? there were rumors that said that they may want to get even with people in law enforcement. reporter: get even because