Who is Kolkata police chief for whom Mamata Banerjee sat on dharna?

Kolkata Police Commissioner Rajeev Kumar, for whom West Bengal CM Mamata Banerjee sat on a dharna, is a 1989-batch IPS officer. Mamata began the 'Save the Constitution' dharna after CBI officials arrived at Kumar's residence in connection with the agency's probe into the Saradha and Rose Valley Ponzi scams. Kumar headed the SIT that was looking into both the scams.