While incarcerated, Gideon studied the American legal system. He concluded that Judge McCrary had violated his constitutional right to counsel under the Sixth Amendment to the United States Constitution, applicable to Florida through the due process clause of the Fourteenth Amendment to the United States Constitution. He then wrote to an FBI office in Florida and then to the Florida Supreme Court, but was denied assistance. In January 1962, he mailed a five-page petition for writ of certiorari to the Supreme Court of the United States, asking the nine justices to consider his case. The Supreme Court agreed to hear his appeal. Originally, the case was called "Gideon v. Cochran" and was argued on January 15, 1963. "Gideon v. Cochran" was changed to "Gideon v. Wainwright" after Louie L. Wainwright replaced H. G. Cochran as the director of the Florida Division of Corrections.