Arun Pati Tripathi, the Special Secretary in Chhattisgarh Excise Department, was responsible for making changes in the policy which led to a Rs 2,000-crore scam in the state, the Enforcement Directorate alleged. Tripathi was arrested by the ED on May 12 under the Prevention of Money Laundering Act (PMLA) in the ongoing investigation into the liquor scam in Chhattisgarh.