Every altercation between people that results in death, including law enforcement involvement, is classified and investigated as a homicide. A grand jury is then presented the evidence in order to determine if a crime was in fact committed and charges need be brought.

A man's home is his castle and one is not legally required to withdraw. The perp was armed and threatening deadly physical force upon a family member. The father used reasonable force to stop the assault on his daughter, heck in this instance the use of a firearm is justified. He used his barehands to stop a knife wielding attacker, a brave man indeed, but any Father worthy of the title would do the same. I predict a happy conclusion to this incident for the family involved.