Dred Scott was a slave owned by an army nurse, Dr. John Emerson, who lived in a free territory for work.
When Dr. Emerson died, Dred Scott tried to buy his freedom from Dr. Emerson's wife on the belief that since he had lived in a free territory, he should be a free man.
Dr. Emerson's wife would not let Scott and his family go since they now lived in Louisiana. The case was soon taken up in court.
After ten years of trying to sue Ms. Emerson, Scott went to the Supreme court.
The supreme justice made the decision to send the Scotts back to the Ms. Emerson on the grounds that, to sue, you must be an American citizen. He went on to say that since slaves were property, the government had no right to ban slavery as it went against the 5th amendment
The ruling aggravated abolitionists and Northerners. They believed this went against the constitution, justice, and the belief of "all men are created equal."
Southerners felt that their right to slaves had been secured, and agreed with the decision.