a dug sting gone bad. a fatal ending for a carolina teenager. the police officer has been cleared but dash cam video shows the actual incident. nick valencia is covering this. the family, what they saw is not what the solicitor saw. they believe federal charges should be brought forward. todd rutherford says he will continue to open the case. the video you are about to see could be considered graphic by some. reporter: you can hear the tires screech as lieutenant mark tiller pulls into the fast food parking lot. in less than a few seconds, gunfire. the two shots killed the driver. 19-year-old zachary hammond. he was unarmed. investigators say he had drugs in his system and package cocaine in his pocket. listen as lieutenant tiller