Amendments was ''the freedom of the slave race. 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. The end of the English. Royal African Company's slave trade monopoly in. (1857), which had held that Americans descended from African slaves could not be U.S. citizens. The slaves were more or less numerous in the different colonies, as slave labor was found more or less profitable. Disparities in arrest rates were carried forward into disparities in the people detained at the Baltimore City Jail (B-5315) on E. All other slave states followed when the 13th Amendment was ratified in 1865, which forever abolished slavery in the now reunited United States. Fourteenth Amendment.