i check the peep hole and if i dont know the person on the other side, i do not answer the door...ever after reading that link though - i bet he DID know the person on the other side....probably pissed off the wrong person, and someone shot him that he thought was a friend is my guess....the house wasnt robbed, and the mother wasnt harmed - the shooter only had one reason to be there, meaning it was probably personal or "business" related