Jason Patrick Callahan (April 18, 1976 – June 26, 1995), previously known as Grateful Doe and Jason Doe, was an American man who was killed in a car accident on June 26, 1995, in Emporia, Greensville County, Virginia. His body remained nameless until December 9, 2015. Earlier in 2015, photographs of an unknown male surfaced on a Facebook page for the John Doe. DNA testing later confirmed Callahan to be the unidentified man.