Bite-mark Evidence
The police turned to a local orthodontist, Gordon Swann, to prove that the marks on Porteous' breasts and neck were Boden's bite marks, with the intent to verify them as having been left by Boden. As there was nothing in Canadian forensic literature on bite mark evidence, Swann wrote to the FBI, hoping for any information on the matter. What he got in reply was a letter from then-director J. Edgar Hoover, who directed him to England, where he met a man who had dealt with 20 or 30 cases.
Eventually Swann was able to get the information he needed and based on a cast made of Boden's teeth he demonstrated 29 points of similarity between the bite marks in Elizabeth Porteous' body and Boden's teeth. This evidence was sufficient for the jury of Boden's trial to find him guilty of murder for which he was subsequently sentenced to life imprisonment.
Read more about this topic: Wayne Boden
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