To admit evidence of a breath test in a Washington criminal case, the state must produce prima facie evidence of certain facts, including that the tested person did not have any foreign substances in their mouth in the fifteen minutes before the test. RCW 46.61.506. The state can make this showing with evidence a check of the person’s mouth found no foreign substances or evidence that the person denied having anything in their mouth.
According to the appeals court’s unpublished opinion, the defendant was involved in a dirt bike collision. He told the deputy on the scene that he had consumed alcohol a few hours earlier. The deputy said the defendant had chewing tobacco in his mouth but removed it at the scene. The deputy arrested the defendant for driving under the influence and took him to jail.
At the jail, the deputy prepared to give the defendant a breath alcohol test. He asked if the defendant had anything in his mouth and the defendant answered no. The deputy observed strands of tobacco in the defendant’s teeth that were not taken out before the test.