Kumar, then IGP (West Zone) here when the case was registered, was arrested in New Delhi on May 2 on the charge of entering into a conspiracy to get a bribe of Rs 10 crore from Paazee Forex Trading company for protecting its directors facing charges of duping depositors to the tune of Rs 826 crore in 2009.
A 1989 batch officer, Kumar was later produced before a court here which remanded him in CBI custody till tomorrow.
Police said the CBI wanted to hold inquiries with two women IPS officers who had served under Kumar during the scam period.
The investigating agency wanted to know whether they were aware of Kumar allegedly using three of their subordinates to extort money from the company and if they failed to report it to their higher ups, police said, adding there was no complaint against the two.
They also said the IPS officer might be taken to Tirupur, the headquarters of Paazee group of companies, tomorrow for interrogation.
The CBI has charged Kumar with abusing his official position and making his subordinates and accomplices extort Rs 2.85 crore, deposited by the public, from Paazee Group of companies. He was on the run for a long time and the Madras High Court had turned down his anticipatory bail plea last month.