In Washington State, RCW 5.60.060(1) provides that “[a] spouse or domestic partner shall not be examined for or against his or her spouse or domestic partner, without the consent of the spouse or domestic partner.” This evidence rule, known as the adverse spousal testimonial privilege, allows a defendant to exclude witness testimony by their spouse under most circumstances. A product of common law tradition, this privilege stems from a time when the law treated women as chattel with no independent legal rights. Since Washington State codified the adverse spousal privilege, the United States Supreme Court amended the federal spousal testimonial privilege by vesting the power to determine whether to testify or not in the witness-spouse. That ...