Wilson Loney was arrested by a state officer for trial before a state tribunal on a charge of perjury, alleged to have been committed in testifying as a witness in a contest for a seat in the house of representatives of the United States, directed and regulated by an act of congress, before an officer deriving his power to take testimony in such contest solely from an act of congress. See title 2, c. 8, Rev. St. U. S.
In general, and indeed in the great majority of cases, perjury is an offense against the state, cognizable exclusivefy by the state courts. But when committed by persons designated by penal laws of congress, in proceedings prescribed and regulated solely by acts of congress, it is an offense against the United States, and is exclusively cognizable by the na- • tional courts. It is contrary to the policy of the law and to the principles of humanity that a person shall be amenable to trial and punishment for the same act in two different tribunals belonging to different jurisdictions. Undoubtedly there are cases in which this policy of the law would seem to be ineffective. In an election where a member of congress and a state officer are voted for at the same time a false oath by the voter would be cognizable in both the national and state courts, and the latter would be generally left to deal with it. So, when a murder is committed, and the fatal shot is received in a national fort-or dock-yard, and death ensues out of such place in an adjoining county, the dual jurisdiction would again occur, and that court would proceed to trial and judgment which first took cognizance of the offense.' These are exceptions to the exclusive rule of jurisdiction, and bring into exercise the comity of courts. I think it is to these cases that section 5328 of the United States Revised Statutes refers.
