Dred Scott was a slave who belonged to a United States Army officer, an army surgeon, John Emerson.  In 1834 Emerson took Scott with him when assigned duty at Fort Snelling, which was located in Wisconsin Territory, a part of the Louisiana Purchase where slavery had been prohibited by the Missouri Compromise of 1820.

Under established law and precedent at the time, law and precedent acknowledged and upheld by southern courts, an owner who took his slave into a non-slave area was regarded as having freed the slave.  Dred Scott loved Dr. Emerson and did not press his case until years after Dr. Emerson's death. 

Scott brought his case against Emerson's widow, Irene, years after Emerson's death and won. Irene Emerson appealed the court's ruling.  This began an inexplicable legal process that lasted 11 years.  Graham raises the obvious question: Who financed it?