played. there were two killers, though he gave no names. one had a knife, the other had the getaway car. both worked at a big box department store. the man who told the story in the bar that day had been the driver of the car and with the blood money, he had bought a truck and a sea-doo. but on the question of who was behind the plot, that's when the story named names, two of them. they were sandra's son tom, the mama's boy jack raised as his own. under the direction of the mastermind herself, jack's wife, sandra. so with that new perspective on the case, dove revisited sandra's old interview. the hours of mostly useless chatter. how many times did you listen to that interview? >> at least ten times. >> reporter: and then it jumped out at him. right about here on the tape, sandra is going through slips of paper in her day planner. she looks at one and says --