sentences:  Finally, parole was such an integral part of the criminal sentencing scheme that it was difficult for Marshall to imagine that there was not an abstract liberty interest in parole.Marshall also argued that the majority did not correctly applied the three-part test in "Mathews v. Eldridge", .The Court focused solely on the risk of an erroneous deprivation, without looking at the other two "Mathews" prongs—the nature of the interest at stake and the burden on the government that a marginal increase in procedural protections entails.