That really depends on your definition of murder. is it murder to kill to protect yourself, family, friends ,strangers. Like if you are in a school carrying a legal firearm and you see someone about to open fire on a crowd and you kill him first is that murder? He may not have been going to kill you but you end him. Is it murder for a soldier to kill the enemy in a war-zone? What if its a 12 year-old strapped with explosives. Let him live and kill 15 soldiers or kill him and save 15? Murder to me is killing for no good reason. And no money, power and unrighteous revenge are not good reasons. Unrighteous revenge would be like if a dude gets fired and shoots up the office. Righteous revenge is the family member who kills that duesche bag for killing their brother, sister, mother, father, son, or daughter when he went postal.