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One Crime, Many Convicted: Dissociative Identity Disorder And The Exclusion Of Expert Testimony In State V. Greene, Mary Eileen Crego

Washington Law Review

In State v. Greene, the Supreme Court of Washington held that expert testimony about Dissociative Identity Disorder (DID) was not admissible to support an insanity or diminished-capacity defense. Even though the court acknowledged DID as a generally accepted medical disorder, the court reasoned that such testimony would not be helpful to the trier of fact, as required by Washington Evidence Rule (ER) 702, because the court has not established a specific standard for determining the legal responsibility of a defendant with multiple personalities. This Note argues that the Greene court had sufficient scientific evidence to establish a legal standard …