This morning a co-worker pointed out this startling story about the Abraham Lincoln researcher who admitted to altering a document housed in The National Archives. Specifically, Thomas Lowry altered Abraham Lincoln's Presidential pardon for Patrick Murphy, a Civil War soldier in the Union Army who was court-martialed for desertion. Using a fountain pen, Lowry changed the date of Murphy’s pardon from April 14, 1864, to April 14, 1865, the day Lincoln was assassinated by John Wilkes Booth. Lowry then claimed the pardon had historical significance, because it could be considered one of, if not the final official act by President Lincoln before his assassination.
According to a press release from The National Archives, the matter was referred to the Department of Justice for criminal prosecution; however the Department of Justice informed the National Archives that the statute of limitations had expired, and therefore Lowry could not be prosecuted. Lowry has been permanently banned from all of The National Archives' facilities and research rooms.
The photo above is a close-up of the altered date on the Lincoln pardon. It comes from the National Archives.