A 15-year-old boy was charged on Thursday in juvenile court with five counts of aggravated murder.

A 15-year-old boy was charged on Thursday in juvenile court with five counts of aggravated murder.

The 11-year-old sister who survived Monday's shooting told investigators that the defendant had recently gotten into trouble for failing tests at school, and that the weaopn he used belonged to their father.

The King County Medical Examiner's Office identified the victims as Sarah Humiston, 42, Mark Humiston, 43, and their children Katheryn Humiston, 7, Joshua Humiston, 9, and Benjamin Humiston, 13.