you ve got a back door on the back patio. alex, if you come this way, you can see what i m talking about. over here on these leaves we just saw investigators going through those leaves. they ve picked something up. they put it in an evidence container. and this is the back patio where investigators were spending quite a bit of time earlier today. now, i don t i don t want to show you the backside of the house because there is some what appears to be blood seeping out of one of the walls. it appears as though whatever happened inside the house happened on that side of the house, possibly the second story given where that blood is. but, again, investigators have given very, very little investigation. what we do know is there were two surviving roommates inside. we don t know if they were sleeping. investigators haven t been able to explain why it was about eight or nine hours when they believed the four people that were inside this home were killed and the first 911 call