By Dr. Maike Hickson, LifeSiteNews - Cardinal Gerhard Müller, former Prefect of the Congregation for the Doctrine of the Faith, said that while he believes Pope Francis is not a heretic, the April 30 Open Letter from prominent clergymen and scholars accusing the Pope of committing heresy, nevertheless, deserves a "response" from Rome… (he) said in an interview with Die Tagespost's Regina Einig that the authors of the letter are “renowned theologians.” Therefore, he says, “it would be important that the Holy Father makes the Congregation for the Faith issue a response, and not the Secretary of State or any of his friendly journalists or theologians.”