Assassination
John Chandler is sentenced to death only to re-emerge as his own brother, courtesy of the CIA who have arranged the subterfuge so they can use him as a double agent.
Starring Henry Silva, Fred Beir, Ida Galli, Peter Dane, Bill Vanders, Alfredo Varelli, Roberto Maldera, Karl-Heinz Menzinger, Gunther Scholtz, Gert von Zitzewitz
Watch "Assassination" on Amazon released in 1967. It's a drama and thriller movie, and has a rating of 5.8 out of 10 from Imdb which is fairly okay for this kind of movie, and is currently only available for purchase or rent.