trent vileta: why isn't things broken? why isn't things on the cupboards or dressers laying on the floor? it didn't make any sense. it looked to me like dustin just got shot and died. dennis murphy (voiceover): had tracey been lying about what really happened in the house? and if so, why? agent vileta came to realize he knew almost nothing about tracey, the woman at the heart of the crime. what i did is, i slowed down. i went back to the beginning, really, that i could find for her. and that was about 1988. dennis murphy (voiceover): 1988. the year tracey married john pitman, the doctor, in virginia. after talking to tracey's ex and sifting through court documents surrounding their marriage, the investigator realized that pitman was nothing like the ogre tracey had described to investigators. bullying incidents? the doctor said it was tracey, not he, who had been abusive. in one memorable set-to, he said she pulled a gun on him. john pitman: she turned to me and said, you're never going to leave this house alive. [chuckles