The Sixth Amendment right to a criminal jury trial is incorporated and applied it to the states. Decided December 21, 1968 (argued January 17, 1968). Opinion of the Court: Byron White → go there Dissenting: Harlan. Applied: the Sixth Amendment → go there Applied: the Fourteenth Amendment → go there Topic: Other areas. Duncan v. Louisiana, 391 U.S. 145 (1968), was a significant United States Supreme Court decision which incorporated the Sixth Amendment right to a criminal jury trial and applied it to the states. Wiki link