If any person duly served with a subpoena and obliged to attend as a witness, shall fail to do so, without any reasonable excuse, he or she shall be liable to the aggrieved party for all damages occasioned by such failure, to be recovered in a civil action.
RCW 5.56.060
Contempts: Chapter 7.21 RCW.
District court, damages for nonappearance: RCW 12.16.050.