re: So the employee that shot the robber is in custody

If the thief is trying to steal something that will ruin your life and cause you or your family to suffer greatly as a result then it's a split second decision that has to be made by the victim.

If the victim chooses to shoot the thief and the thief dies as a result then the thief's choice to willfully commit the crime in the first place is responsible for any negative repercussions to the thief for willfully making that choice.