Jason Patrick Callahan (April 18, 1976 – June 26, 1995), previously known as Grateful Doe and Jason Doe, was a young American man killed in a vehicle accident on June 26, 1995, in Emporia, Greensville County, Virginia. His body remained unidentified until December 9, 2015. In 2015 photographs surfaced of a young man, later identified as Jason Patrick Callahan, on the Facebook page for the John Doe. DNA testing later confirmed Callahan was indeed the unidentified man.