>> first responders find the three adults in a bedroom upstairs, vera and amy bound in chairs, and savvas on the floor. >> the 10-year-old was handled separately. >> philip is discovered in his bedroom, alone. >> he was the bargaining chip, the threat was made against him while getting the adults to do whatever the perpetrator wanted. >> the unknown of where is my son? i want to see my son or whatever pain and suffering he was going through, it's all in the mind of a killer. >> clearly this is where the fire started. philip's bedroom where his body was found. why do you think they started the fire there, which could easily be seen on the street. >> i think this is a mistake of a killer who is not particularly organized, a killer who thought