Justice McLean dissented from the court 's decision that a slave was a piece of property that could be transported by his owner from a Southern state into a territory that forbade slavery without losing his slave status .
Justice McLean cited Marie Louise v. Marot as his precedent .
Justice McLean dissented from the court 's decision that a slave was a piece of property that could be transported by his owner from a Southern state into a territory that forbade slavery without losing his slave status , and cited Marie Louise v. Marot as his precedent .