The History Place
The History Place: The Dred Scott Decision
This site from The History Place provides an account of the history of Dred Scott, an African-American slave, who took his suit for his freedom to the Supreme Court. The information is somewhat brief, but worthwhile.
Wikimedia
Wikipedia: Dred Scott v. Sandford
This site from the Encyclopedia Wikipedia provides information on the Dred Scott case, as it progressed through the Missouri state court, the Federal court system, and the appeal that went to the Supreme Court.