Allegheny County Medical Examiner Karl Williams discusses the DNA evidence his office used to help police identify 38-year-old Arthur Lamont Henderson as a suspect in two rapes at Ross Township ... more 
Allegheny County Medical Examiner Karl Williams discusses the DNA evidence his office used to help police identify 38-year-old Arthur Lamont Henderson as a suspect in two rapes at Ross Township apartments. less 
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WTAE - Pittsburgh Videos
Mon, May 7, 2012 3:23 PM EDT