matt denlinger only in kindergarten. but years later, as cedar rapids investigators, they'd come to know every detail of this case. >> very frenzied to attack. there was blood everywhere. there was blood spatter all over the inside of the car. >> did the color leave a blood trail away from the scene? did you get lucky in that? we >> know. there's no luxurious away from the scene. for that killer did leave some signatures. the officers found love prince on the outside of the car, in the dirt, on the door handle. they love looked like dishwashing gloves from the late seventies, early eighties, that everyone would have in their house. >> so, the killer came to do business? >> oh, yeah. >> the color came to do business. >> michel had warily deep defense of wounds on her hands. she put up a fight. >> the blood told them the struggle to place mostly on the passenger side. but -- >> that gearshift has blood on it. steering wheel has blood on it. we know michelle is not driving the car. >> so what does that suggest you? what is