15-year-old Andrew Humiston arrested for killing his parents and 3 siblings in Fall City

King County - 15-year-old Andrew Humiston arrested for killing his parents and 3 siblings in Fall City. Authorities have identified the victims as 7-year-old Katheryn Humiston, 9-year-old Joshua Humiston, 13-year-old Benjamin Humiston, and their parents, 43-year-old Mark Humiston and 42-year-old Sarah Humiston.