Satyabrata Kumar, a 2004-batch IRS officer who served nearly 12 years in the Enforcement Directorate and led probes into cases involving Nirav Modi, Vijay Mallya, and the Mahadev betting app, received approval for voluntary retirement in April with formal orders issued earlier this month. He was repatriated from the ED one year prior and posted as Commissioner (Appeals) in Siliguri before exiting to pursue personal interests. All verified details originate from the same two left-center sources.