. >> reporter: on that day heath and his friend skylar wattie were inside the house playing video gameswaiting to be driven to heath's birthday celebration. >> did you see anything different or out of the ordinary, or anybody walking around, anybody come up to the door, anything you can think of? >> not really. >> reporter: the detective also interviewed skylar wattie, who said right before leaving for the party, tom sent the two boys outside to go start up the truck. >> he said that he'll be out there in a little bit. i don't know what he was doing in there, taking a shower or what. >> reporter: like heath, skylar couldn't recall anything unusual about that day either. and then, suddenly -- >> yeah, when we were outside running across the barns, there was a big crash, like way in the back of the house. >> what did it sound like? >> like breaking glass and a bunch of things falling. like a vase just -- >> it was a loud sound? >> yeah. >> reporter: detective karbon showed skylar a drawing of the foley farm and asked skylar to place an "x" where he believed the sound originated. >> like,