Sen, as the then joint commissioner, had cracked the rape of an Anglo-Indian lady which Banerjee had dubbed as "fabricated". Soon Sen was given the marching orders to take up her responsibility as the new DIG, (Training), and later DIG (Darjeeling Range).
Even as Banerjee was busy confronting the "non-performers" a senior IPS officer has taken on the chief minister herself as well as other senior officials, accusing them of denying him promotion and launching a "criminal conspiracy" to humiliate and defame him.
Additional Director General of Police (Provisioning) Nazrul Islam, who earlier had alleged "corrupt practices" during Banerjee's tenure as railways minister, has filed a police complaint against Banerjee, Chief Secretary Sanjay Mitra, Home Secretary Basudeb Bannerjee, Director General of Police Naparajit Mukherjee and a few other senior officials.