If a person believes that the Prophet salla Allahu alaihi wa sallam is alive and he knows al ghaib and that he has control over the universe, this person is no Muslim and it is not permissible to pray behind him.
If a person believes that the Prophet salla Allahu alaihi wa sallam is alive and he knows al ghaib and that he has control over the universe, this person is no Muslim and it is not permissible to pray behind him.