In the 1930s, Mr. Payne graduated from Southern University, moved to Natchitoches, married a teacher named Pearl, and had started a family before entering military service for World War II. After returning, Mr. Payne sued for admission to LSU’s graduate program in agricultural education. A. P. Tureaud, Sr., filed suit in federal court on Mr. Payne’s behalf, and after a very short trial, Mr. Payne…