What was the US Supreme Court's decision when Dred Scott, a slave, attempted to sue for his freedom? The US Supreme Court determined that he

Supreme Court rules in Dred Scott case. The U.S. Supreme Court hands down its decision on Sanford v. Dred Scott, a case that intensified national divisions over the issue of slavery. In 1834, Dred Scott, a slave, had been taken to Illinois, a free state, and then Wisconsin territory, where the Missouri Compromise of 1820 prohibited slavery.