In Washington, actual danger is not necessary for a homicide to be justifiable.
Homicide is justifiable “when in the actual resistance of an attempt to commit a felony upon the slayer, in his or her presence, or upon or in a dwelling, or other place of abode, in which he or she is.”
Washington’s Supreme Court came to this decision during the case of the State v. Reynaldo Redmond. The case involved a fight between students in a high school parking lot. It concluded that persons acting in self-defense have no duty to retreat when assaulted in a place they have a right to be.
You can read more on justifiable homicide in Washington here, and get full details on Washington State v. Reynaldo Redmond here.