Robert A . Smith, The American Revolution : An Illustrated History of the War for Independence and Its Aftermath 12-year-old girl was actually undercover New York City detective . Singer was identified in court document as National Children 's Museum spokesman . Washington museum officials say they are `` horrified '' by the charges .
Robert A . Singer is accused of e-mailing child porn to 12-year-old girl . 12-year-old girl was actually undercover New York City detective . Singer was identified in court document as National Children 's Museum spokesman . Washington museum officials say they are `` horrified '' by the charges .