As a republican and 24th governor of Louisiana, Pinchback served from December 1872 to January 1873, for only about a month. He served the Union Army during the Civil War, meaning he opposed slavery.
The Freedman's Bureau was created to help former black slaves and poor whites in the South after the Civil War. Giving them education and medical help was very important in helping them recover from the revolution and helped the freedmen to be able to live on their own.
Since a patrician is part of the upper level of society they have more rights then the plebeian, if the plebeian commits a crime they will have less rights. So a patrician will probably be treated fairly and the plebeian will be treated less fairly than a patrician.