Section 46.37.675 - Signal preemption device-Accident-Death-Penalty(1) When an accident that results in death to a person occurs as a proximate result of the operation of a signal preemption device which was not authorized in RCW 46.37.670, the driver is guilty of negligently causing death by use of a signal preemption device.(2) Negligently causing death by use of a signal preemption device is a class B felony punishable under chapter 9A.20 RCW.