wright during the traffic stop. >> he had a look of fear on his face. it's nothing i'd seen before. we were struggling. we were trying to keep him from driving away. it just went chaotic. >> reporter: wright who officers learned had an outstanding warrant for a weapons violation was initially pulled over for minor offenses. pointed out by a rookie officer. >> we discussed a little bit of suspicious activity. he noticed a pine tree or air freshener hanging from the rear-view mirror and the tags were expired. >> potter revealing they would not have pulled wright over at all if she hadn't been training that officer. >> and why not? >> an air freshener to me, it's just an equipment violation. >> you did stop the vehicle, right? >> yes, part of field training is my probationer would make numerous contacts with the public throughout the day. >> reporter: that contact would turn fatal. >> i shot him.