the atf traced a gun sold by the hunts to drug dealers, felons, crime scenes, even into the hands of a mentally ill person. all prohibited from owning firearms and cnn's investigation including an admission from the shooter himself found that the 38 caliber smith and wesson used that nearly killed him can be traced to mary hunt. mary and terry hunt never responded to cnn. neither did son, rusty. this is derrick who asked us to come into his trailer, no camera. >> he is still pron probation for another two years. >> he doesn't want to talk about the case. i explained to him our story and i explained for him about tracking the guns to crimes and i explained to him in particular that a smith and wesson that