(1) A person is guilty of rendering criminal assistance in the first degree if he or she renders criminal assistance to a person who has committed or is being sought for murder in the first degree or any class A felony or equivalent juvenile offense.
(2)(a) Except as provided in (b) of this subsection, rendering criminal assistance in the first degree is a class B felony.
(b) Rendering criminal assistance in the first degree is a gross misdemeanor if it is established by a preponderance of the evidence that the actor is a relative as defined in RCW
9A.76.060 and under the age of eighteen at the time of the offense.