William Richards was the obvious suspect in the murder of his wife: Pamela was planning to leave him for another man, her killer did not rape her or steal anything, and Richards had no airtight alibi.
After three trials — the first two juries hung — Richards was finally convicted of murdering Pamela. A prosecution expert at the third trial — but not at the first two — testified that a crescent-shaped mark on Pamela’s hand came from a bite that matched the unusual pattern of Richards’ bottom teeth.
The dental expert later said he had been wrong, but the California Supreme Court decided 4-3 in 2012 to uphold Richards’ conviction anyway. “The case against petitioner was strong,” retired Justice Joyce L. Kennard wrote for the majority back then. Read more.