The probe into the sensational fake doctor cases in West Bengal has taken a fresh twist with the CID arresting a gastroenterologist who has been treating patients in a renowned corporate hospital for over two decades by submitting an allegedly bogus registration number and MBBS degree an official said on Sunday. We arrested Ajay Tewary from his clinic in Kolkata's Khidirpore area on Saturday. His letterhead claims that he is a consultant gastroenterologist with the Kothari Medical Centre. However we found that he had submitted a bogus registration number with the Medical Council of India and had no MBBS degree.