The house was destroyed by a deliberate natural-gas explosion the next morning, and Fisher is now believed to be hiding out in Tonto National Forest northeast of Young.
Family annihilations are almost never spontaneous, academics say.
They are almost always the result of long-term pressure building up inside the marriage, combined with a traumatic triggering event. This is often depression that outsiders can't see. The man identifies with his family so much that he sees them as a part of himself, and by taking their lives, he is generalizing his own suicide. He thinks he is saving them from the shame and embarrassment of what he is doing with his life. There was a tornado inside somewhere.