This ruling allowed for racial segregation in public facilities, which had a detrimental impact on the civil rights movement. Part of the evidence that was presented during the arguments was testimonies from witnesses stating legal altercations and the actual Louisiana law that mandated segregated trains. The defense argued that the law was constitutional and that racial segregation was necessary to maintain necessary separation. The prosecution later argued that the law violated the 14th amendment. The case Plessy v. Ferguson examines the constitutionality of racial segregation and was a form of discrimination, It wasn't until the Brown v. Board of Education case in 1854 that the “separate but equal” doctrine was overturned. On May 17th 1854 a decision in the Brown v Board of Education case declared the “separate but equal” doctrine unconstitutional. Brown v Board of Education was a landmark supreme court case in the United States that challenged racial segregation in public schools. The court ruled that segregation in public schools was unconstitutional, which began a significant step towards ending racial segregation in the