Daniel Dougherty of Philadelphia was convicted of setting a fire that killed his two sons , and was sentenced to death. Because the fire started nearly simultaneously in three places, John Quinn, an assistant fire marshal, concluded it was a case of arson, says ABCNews.com.
Several leading arson experts now say there was no scientific evidence of arson that night. Quinn "was so far off base it's unbelievable that no one challenged his expertise or methodology," said John Lentini . . .
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