On July 30 , 2016 , a mass shooting occurred at a house party in the Chennault Beach neighborhood of Mukilteo , around midnight . Three people were killed using an AR-15 style rifle and another was left with serious injuries . The perpetrator , a graduate of Kamiak High School , was sentenced to life imprisonment without the possibility of parole . The Mukilteo shooting , one of several mass shootings in the state in the 2010s , was cited as the inspiration for an assault weapons restriction that was rejected by the state legislature and passed by voters in 2018 as Initiative 1639 . In February 2018 , an Everett resident was arrested prior to a planned school shooting that would have targeted ACES Alternative High or Kamiak High School
mass shooting
2016 Mukilteo shooting
Mukilteo, Washington