In January 2011, agents of the National Archives and Records Administration (NARA) obtained a signed confession from Lowry that in 1998 he had smuggled a fountain pen into a NARA research room in Washington D.C., and used it to alter the date on a presidential pardon issued by Abraham Lincoln to a Union soldier who had been sentenced to death by court martial. A NARA press release announced that Lowry admitted to changing the handwritten year of the 1864 pardon so that Lincoln's signature appeared to be dated "April 14, 1865" – the same day Lincoln was assassinated at Ford's Theater. Lowry had cited the altered document in his 1999 book "Don't Shoot That Boy! Abraham Lincoln and Military Justice". It was alleged that Lowry's motive was to gain publicity by claiming that he, as an independent researcher, had found what would have been the final official document signed by President Lincoln before his death.