The Special Investigation Team (SIT) probing the misappropriation of funds from the state-run Karnataka Maharshi Valmiki Scheduled Tribe Development Corporation has filed a preliminary charge sheet mentioning the arrest of 12 people and the seizure of Rs 49.96 crore in the case, police said on Monday. The opposition BJP and JD(S) have been demanding the resignation of Chief Minister Siddaramaiah over the scam that has already led to the resignation of Minister B Nagendra, who is currently under ED scanner. The Valmiki Corporation's former officials including ex-Managing Director J G Padmanabha and Ex-Accounts Officer Parashuram Durgannanavar; First Finance Credit Co-operative Society Limited Chairman Sathyanarayana Etakari; acquaintance of Former Minister Nagendra Nekkunte Nagaraj; and Brother-in-law of Nekkunte Nagaraj Nageshwar Rao are among the 12 arrested, police said. According to a police statement regarding the charge sheet, the SIT is conducting the investigation under the .