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Associated Press
FILE-A Monday, March 5, 2007 file photo shows Roy Brown, center, walking out of court a free man with his lawyers Nina Morrison, right, and Peter Neufeld in Auburn, N.Y.  Brown was convicted in 1991 of an upstate New York woman's murder.  In January 2007, further DNA testing and the bite mark evidence later proved to be associated with another man who had killed himself, and Brown was released from prison.    Since 2000, at least 18 men convicted in rapes and murders largely because of bite-mark analysis have been exonerated by DNA testing or otherwise proved not guilty. (AP Photo/Kevin Rivoli, File)

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