This is the third entry in our series of Closer Looks on some of the most famous Supreme Court plaintiffs. In 1890, Louisiana passed the Separate Car Act, which required separate railcars for Black and white passengers. Plessy was charged with violating the Separate Car Act, and he argued that this was unconstitutional under the Constitution’s 13th and 14th Amendments. A month later, the Louisiana Supreme Court unanimously affirmed Ferguson’s decision. Following the case, Plessy returned to private life.