person? yeah. i think there is a high probability. and i m a science guy, so i would like to follow the science here and think that there is some kind of traces left behind. remember we talked about just a second ago how savage this case was. many times when you have auto sharp force injury death like this a homicide so brutal and so very frenzied one of the things that happens the perpetrator will cut themselves. have you this co-mingling of d.n.a., biological evidence at the scene. and, also, this is something else to think about. we didn t really know at the beginning what the sleeping position was for anybody in this residence. you have it understand we have got two sets of people that are essentially co-sleeping together. in my mind, at least that would mean that the p. perpetrator would have actually have gotten into the bed and begun to attack them. you have a huge opportunity for there to be transfer evidence at the scene from the perpetrator to the victims and the