(this is for the 1883 case, I was unsure which you meant as you never gave a year)
Answer:
Better known as the Ku Klux Case
Explanation:
The US tried to charge Harris with the Force Act of 1871, later in this case the act was concluded unconstitutional.
The Supreme court declared that local governments have the power to penalize crimes such as assault and murder; simultaneously deciding it unconstitutional for the federal government to do so.