down. accident. we just didn t believe. you could tell he was beaten. reporter: now the family is asking the school board to row lease any surveillance video from that day to see if any clues could be found there. we believe that these videotapes would clearly answer many of the questions surfaced over these many months. reporter: in june, the johnson s exhumed kendrick s body and hired a doctor to conduct an autopsy and he checked that bruised right side jaw. we saw there was intet blunt force trauma to that area. reporter: he took blows to the neck? he took at least one county to the neck. reporter: the investigators stand behind their investigation. we found an area on the wall that appeared to be blood and twested it and it was blood and we did dna testing and it was not the blood of johnson. reporter: did you find out who it was? as of now, we have not. but it doesn t appear to be related to our crime in any way.