when the unfaithfulness of the wife became known, they quarelled and the guy killed his wife.
their 5 years old son was still sleeping and the neighbors never did find out. so it was a perfect crime.
the weird thing was that the kid did'nt notice his mom is missing even after a day or 2 days later.
so the father told his son : " is there something you want to ask me?"
the kid said: "nothing, it's just that, why is mom always at your back...?