When I read of something like this I am reminded of a family two houses up from where we used to live in New Mexico. One day he came home, shot the wife, kids and himself.
A similar thing happened here a couple of decades ago.
An Air Force non-com killed his wife and two kids and chopped them up in the bathtub, but then fled, apparently to Hawaii.
He was featured on an episode of America’s Most Wanted a couple of years later and was recognized by his neighbors ..................