As the Supreme Court decided in the case of _Prigg_ v. _Pennsylvania_ that the officers of the State were not legally obligated to assist in the enforcement of the Fugitive Slave Law of 1793, Congress passed another and a more drastic measure in 1850 which, although unusually rigid in its terms, was enthusiastically supported by the Supreme Court in upholding the slavery regime. The Fugitive Slave Law of 1850 deprived the Negro suspect of the right of a trial by jury to determine the question of his freedom in a competent court of the State. The affidavit of the person claiming the Negro was sufficient evidence of ownership. This law made it the duty of marshals and of the United States courts to obey and execute all warrants and precepts issued under the provisions of this act. It imposed a penalty of a fine and imprisonment upon any person knowingly hindering the arrest of a fugitive or attempting to rescue one from custody or harboring one or aiding one to escape. The writ of habeas corpus was denied to the reclaimed Negro and the act was _ex post facto_. In short, the Fugitive Slave Law of 1850 committed the whole country to the task of the protection of slave property and made slavery a national matter with which every citizen in the country had to be concerned. In the interest of the property right of the master, moreover, the Supreme Court by the Dred Scott Decision[6] upheld this measure, feeling that there was in Congress adequate power expressly given and implied to enforce this regulation in spite of any local opposition that there might develop against the government acting upon individuals to carry out this police regulation. The Negro was not a citizen and in his non-political status could not sue in a Federal court, which for the same reason must disclaim jurisdiction in a case in which the Negro was a party. In the decision of _Ableman_ v. _Booth_[6a] the court in construing the provision for the return of slaves according to the Fugitive Slave Law of 1850 further recognized the master's right of property in his bondman, the right of assisting and recovering him regardless of any State law or regulation or local custom to the contrary whatsoever. This tribunal then believed that the right of the master to have his fugitive slave delivered up on the claim, being guaranteed by the Constitution, the implication was that the national government was clothed with proper authority and functions to enforce it. These were reversed during the Civil War by the nation rising in arms against the institution of slavery which it had economically outgrown and the court in the support of the Federal Government exercising its unusual powers in effecting the political and social upheaval resulting in the emancipation of the slaves, again became decidedly national in its decisions.