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In page Clarence Earl Gideon:

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After his acquittal, Gideon resumed his previous way of life and married for a fifth time some time later. He died of cancer in Fort Lauderdale, Florida, on January 18, 1972, at age 61. Gideon's family had him buried in an unmarked grave in Hannibal. The local chapter of the American Civil Liberties Union later added a granite headstone, inscribed with a quote from a letter Gideon wrote to his attorney Abe Fortas, "Each era finds an improvement in law for the benefit of mankind."