The two adults killed in the Fall City quintuple homicide were identified Tuesday. Parents Mark and Sarah Humiston were among the five people killed inside a home on Lake Alice Road Southeast around 5 a.m. Monday. The three other victims were their children, who were juveniles. The suspect in the killings was the couple's 15-year-old son. KING 5 is not naming the suspect as he is a juvenile and has not yet been charged. He also has no prior criminal history.