Monroe Hickson (July 8, 1908 – December 29, 1967), also known as Willie Tyler, nicknamed Bluecorns, was an American serial killer who murdered four shopkeepers in Aiken County, South Carolina, during a crime spree spanning between April and September 1946. Hickson was not suspected in the murders until 1957, when he was jailed for attempted murder. Before his arrest, another man was wrongfully convicted for two of the murders.