The ED arrested Mahadev app promoter Saurabh Chandrakar in Raipur after his extradition from Oman. Investigators will confront him with digital evidence and records linked to alleged laundering. The Enforcement Directorate (ED) on Friday arrested Saurabh Chandrakar, the main accused and promoter in the multi-crore Mahadev online betting app cheating case, under the anti-money laundering law in Raipur, news agency Press Trust of India reported.