"On Easter Sunday of 1873, just eight years after the Civil War ended, a band of white supremacists marched into Grant Parish, Louisiana, and massacred over one hundred unarmed African Americans. The court case that followed would reach the highest court in the land. Yet, following one of the most ghastly and barbaric incidents of mass murder in American history, not a single person was convicted. The opinion issued by the Supreme Court in US v. Cruikshank...