War Marion (plaintiff) was an inmate at the Columbia Correctional Institution (prison) (defendant). After a prison psychologist observed Marion in an altercation with a fellow inmate, the prison brought disciplinary proceedings against Marion. The prison ultimately disciplined Marion with 240 days of segregation and moved Marion to a more restrictive segregation unit. Marion sued the prison, alleging that the disciplinary proceedings lacked adequate procedural protection, thereby depriving Marion of due process of law. The district court dismissed the complaint for failure to state a claim. Marion appealed. The Court of Appeals addressed whether Marion’s segregation implicated liberty interests under the due process clause.