In 1956, the TV show "I've Got a Secret" had a guest who had witnessed Lincoln's Assassination!

de bene esse: literally, of well-being, morally acceptable but subject to future validation or exception

Abraham Lincoln was the 16th President of the United States, serving from March 1861 until his assassination in April 1865. Lincoln led the United States through it's greatest constitutional, military, and moral crisis: The Civil War.

Samuel James Seymour on the other hand, was the last surviving person who had been present in Ford's Theater the night of the assassination of U.S. President Abraham Lincoln on April 14, 1865. He was from Maryland and lived in Arlington, Virginia in his later years.

Just two months before his death, at age 95, he appeared on the February 9, 1956 episode of the CBS TV quiz show I've Got a Secret as a mystery subject and stated on national TV that he was the last survivor that witnessed Abraham Lincoln’s death.

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