J.E.B. v. Alabama ex rel. T.B. extended precedent in which 1986 case regarding race-based peremptory challenges in criminal trials?
J.E.B. v. Alabama ex rel. T.B.:  "J.E.B." extended the court's existing precedent in "Batson v. Kentucky" (1986), which found race-based peremptory challenges in criminal trials unconstitutional, and "Edmonson v. Leesville Concrete Company" (1991), which extended that principle to civil trials. Batson v. Kentucky: Batson v. Kentucky, 476 U.S. 79 (1986) , was a case in which the United States Supreme Court ruled that a prosecutor's use of peremptory challenge in a criminal case—the dismissal of jurors without stating a valid cause for doing so—may not be used to exclude jurors based solely on their race.
Batson v. Kentucky