According to this blog, Jacques Fesch, a 27-years-old playboy, who was beheaded in 1954 in France for the murder of a police officer following a bungled robbery, is being considered for Catholic sainthood. Apparently, "many Catholics in France now believe that the killer died a saint. Thirty years after his execution, the archbishop of Paris, Cardinal Jean-Marie Lustiger, signed a decree that may one day see him beatified."
He admitted to shooting a police officer in an attempt to flee a robbery. After his conviction and death sentence, he underwent a profound conversion. Not profound enough, however, to convince him of the justice of his sentence, which he believed to be excessive since he did not premeditate the murder.