The Mumbai Crime Branch Unit 11 has filed a chargesheet against former Mumbai police commissioner Param Bir Singh and three others in an extortion case involving hotelier Vimal Agarwal. 

The 1,895-page chargesheet was filed in the court of the Additional Chef Metropolitan Magistrate. The statements of a total of 36 witnesses were taken in the chargesheet, including that of an ACP, police inspector and constable.