In an important decision, the Court of Appeals of Washington addressed the issue of whether a warrantless blood test violated the rights of a defendant charged with driving under the influence (DUI) of marijuana. In City of Seattle v. Pearson (Wash. Ct. App. Feb. 29, 2016), the defendant struck a pedestrian with her car. The defendant suffered from health conditions for which she was authorized to consume medical marijuana and told police she had smoked earlier in the day. After the defendant performed field sobriety tests, the police officer arrested the defendant on suspicion of driving under the influence. The officer then transported the defendant to a hospital for a blood draw without her consent or a warrant, two hours after the accident had occurred. The test determined a THC concentration of approximately 20 nanograms.
Both the U.S. and Washington State constitutions provide protection against unreasonable searches, including the intrusion into a person’s body to draw blood. Absent a recognized exception, a warrantless blood draw is unlawful. An exception may exist in the case of exigent circumstances, in instances where acquiring a warrant is not realistic because the delay that occurs in the pursuit of securing a warrant would adversely affect factors such as an officer’s safety, enable escape, or allow for the destruction of evidence. On appeal, the defendant argued that the trial court erred in admitting evidence of the blood test after finding that exigent circumstances existed to justify the warrantless blood test.