. >> not benign but something expla explainable? >> right, right. >> inside, officers quickly grasped the cold stomach turning truth. their deaths were not accide accidental. >> it was going to be a long investigation. detective neil was one of the first detectives on the scene. that night he entered through the garage and saw gary first. >> we could see there was a deceased male in the hallway of the home. >> his pants were pulled down. what did you make of that? >> we didn't know. the only thing we could think of was he's trying to get away from somebody, that they're grabbing ahold of him. >> or was the killer rifling his pockets for something, a key maybe, a combination? in gary's office downstairs, the detective saw jan. >> she was on the ground, she was lying face-down but it was obvious that there was severe trauma to the back of her head. >> so was this a violent home invasion? jan and gary had more than half a million dollars worth of valuables in the house for the gr grabbing, so a botched robbery was the likely scenario.