Sacked Rajasthan Minister Mahipal Maderna has been arrested by the CBI along with the brother of a ruling Congress MLA in the Bhanwari Devi abduction case.Maderna and Parasram Bishnoi, brother of ruling party MLA Malkhan Singh, were taken into custody on Friday after another round of questioning.Maderna was sacked from the Ashok Gehlot Cabinet on October 16 after his name cropped up in the abduction case.