John Frank Dalton was a man who, in the last few years of his long life, publicly claimed to be the famous outlaw Jesse James. Contrary to his claim, most historians believe that Dalton was merely a Jesse James impostor, and that the real Jesse James was killed by Robert Bob Ford on April 3, 1882, in Jesses rented home at 1318 Lafayette Street in St. Joseph, Missouri.
DNA research recently conducted on certain members of the Dalton family in the United States indicates that the true identity of the Jesse James impostor J. Frank Dalton possibly has now finally been revealed. This new evidence indicates that J. Frank Dalton was, surprisingly, actually a man by the same name John Frank Dalton, Sr. but that he was born about 1856 , thus making him aboutyears younger at the time of his death than is generally believed. Being born in 1856 instead of in 1848 would make him about 95 years old at the time of his death instead of about 103 years old. This new evidence indicates that the Jesse James impostor J. Frank Dalton was actually John Frank Dalton, Sr. , the third child of David Louis Dalton and Davids third wife Nancy J. Self, daughter of Elijah Self, . David and Nancy hadchildren altogether, of whom John Frank Dalton, Sr. was the third.
Source: Wikipedia