(Vancouver, WA)  --  The 17-year-old son of triple murderer Brent Luyster is now charged with murder himself.  Court documents say Brent Luyster Junior is accused of the deadly stabbing of his step-father.  The Clark County Sheriff's Office says it happened early Monday morning in Amboy.  After the stabbing, Luyster allegedly went to a neighbor's house and said his step-father attacked him and he acted in self-defense.  Deputies responded and took Luyster into custody.  Brent Luyster Senior was convicted in 2017 of murdering three people and shooting a fourth person in the face at a home in Woodland.