Tabitha M. Powledge raises questions — her own and others — about the bloodstained shawl that supposedly proves Jack the Ripper was an immigrant Polish baker named Aaron Kosminski: "Any decent TV defense attorney would rip the shawl to shreds. It must contain dozens of DNA deposits from the many people who have handled it in the past century and a quarter." Also in her weekly blogs roundup, more bad stuff turns up in government labs, and picking a Rosetta landing site.
September 13, 2014
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