Answer:
J.F.A Sanford was the other party in the Dred Scott's case
Step-by-step explanation:
Dred Scott was a slave to his master Dr. John Emerson for so many years in the city of Wisconsin.
After the demise of his master,Dred Scott sued his master's widow for freedom on the grounds it is prohibited to live in a free state as a slave.
The case started from lower courts and finally ended in the Supreme Court with the Court ruling that Scott has no right to seek his freedom.
This ruling further confirmed the uncontrollable differences in America which led to Civil War in 1861.