and we just go flying through the barricade. >> local realtor mona wehde was looking for her son dustin driveway of the roberts' home, secured now behind crime scene tape. mona says police officers wouldn't let her near it. >> and i looked at them and i said, "is my son here?" and they go, "yes." and i go, "is he dead?" and they go, "yes." >> the body of dustin wehde -- the young man being mentored by tracey's husband -- was sprawled on the couple's bedroom floor. tracey had shot him to death in what appeared to be a desperate act of self defense. did they let you see your son, mona? >> no. >> did they tell you anything about what had happened in the house? >> no. no. they told us to go home. i said, "i want to hold him." and they said, "you can't." >> twelve miles away at the hospital, tracey was finally safe and breathing on her own. investigators' photos captured the ugly red choke marks on her neck and a look of terror in her eyes. what had she endured that night? tracey told us she could not believe it when police told her it had been her friend's son dustin who had attacked her. s