Tall Target (The) (1951)

In 1861, New York Police Sergeant John Kennedy finds a plan to assassinate President Abraham Lincoln. His chief Superintendent Simon G. Stroud does not believe in his report and Kennedy resigns to hunt the conspirators alone. He informs to Stroud that he had sent his report to the Secretary of War and requests a meeting with Lincoln in Baltimore. He boards the train to Baltimore and does not find his friend Inspector Reilly with his train ticket that was waiting for him, but finds his wallet. Kennedy seeks out Reilly and finds body on a platform; however the corpse falls off the train. When he returns to his seat, there is an impostor posing to be Kennedy but he brings the conductor to the cabin of his acquaintance Colonel Caleb Jeffers that confirms his identity. Kennedy looks for a gun to arrest the impostor but the criminal subdues him with his gun. They leave the train at the next stop but Kennedy fight with the impostor and Colonel Jeffers shoots and kills the man. Kennedy returns to the train and soon he discovers several conspirators in the train. Will he be capable to save Abraham Lincoln?