Fred Borch, a local lawyer and historian, talks about Mary Surratt, who was prosecuted in 1865 for conspiring to kill Abraham Lincoln.  She was found guilty and hanged--but was she really innocent?  Fred Borch, who worked as a history advisor on the soon-to-be-released Robert Redford film "The Conspirator" about Mary Surratt, (with Robin Wright as Surratt), discusses the evidence in the case.