Part two of Pamela Colloff’s ProPublica/New York Times “Blood Will Tell” investigation into the faulty forensic “science” of blood spatter analysis came out today. It’s a sobering look at the reliability — or lack there of — of what has become an important crime scene investigation technique, and anyone who cares about criminal justice or understands forensics only via Dexter should read it. If you haven’t yet read part one, which details the unlikely arrest and conviction of Joe Bryan for the murder of his wife, Mickey, now’s the time:

When Robert Thorman settled into the witness box on the fifth and final day of the state’s case, it marked a turn in the prosecution’s fortunes. Thorman was the bloodstain-pattern analyst who was called to the Bryan home when investigators were still working the scene. As an interpreter of bloodstains, Thorman possessed a singular expertise, and…

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