A sad story, but the reporter tried to lighten it up by making it impossible:
Fire officials initially suspected that the fire was caused by arson, but it wasn't until officials examined the victims' bodies that they were able to determine murder-suicide - two of the victims' throats were slashed.
They believe that the oldest child, a 14-year-old boy, killed himself and then set the fire that killed the others.
Reminds me a little of the old Foster Brooks joke about the man who catches his wife in bed with his business partner. The man pulls a gun and puts it to his head. And when his wife nervously giggles he says, "Don't laugh, you're next!"