Note 402 — Chapter V · The Power of the States to Interfere with the Mails

To make the record complete it should be added that the federal courts have exclusive jurisdiction of all offenses embraced by statute, committed in a postoffice owned by the United States or jurisdiction over which has been ceded by the state. Battle v. U. S., 209 U. S. 36 (1908). But the fact that a train is engaged exclusively in carrying the United States mail does not preclude the jurisdiction of a state court of a prosecution for the murder of an engineer, committed by derailing the train. Crossley v. California, 168 U. S. 640 (1898).