Amendments was ''the freedom of the slave race. 7.3Out of Wedlock Births. Amdt14.Case,1 however, Chief Justice Taney, writing for the Court, ruled that this rule did not apply to freed slaves. By 1890, however, white legislators restored white supremacy through segregation. The Thirteenth Amendment officially abolished slavery. Scott, a slave, argued that he was free because his owner had taken him to territory where slavery was banned. Scott, a slave, argued that he was free because his owner had taken him to territory where slavery was banned. What were Jefferson's reasons for deploring the existence of slavery in the United States? The Thirteenth Amendment officially abolished slavery. The conspicuous exception to this was the holding in the Dred Scott case that former slaves, as non-citizens, could not claim the protections of the clause.