A Delhi court on Saturday denied anticipatory bail to Chitra Ramkrishna, the former chief executive officer (CEO) of National Stock Exchange (NSE), amid reports of her being questioned by a senior psychologist of the Central Forensic Science Laboratory (CFSL) to ascertain the facts relating to the mysterious yogi and the co-location scam at the bourse.

During a hearing on Saturday, special judge Sanjeev Aggarwal disapproved of the CBI’s ‘lackadaisical’ conduct, saying no action seems to have been taken against the main scam beneficiaries for the last four years. He added that the Securities and Exchange Board of India (Sebi) was “too kind and gentle’’ with the accused.

“As no action seems to have been taken against the main beneficiaries of the present co-location scam, (the names of some of whom are mentioned in the FIR itself) and others for almost four full years, who seem to be enjoying merrily at the expense of common citizens for the reasons best known,’’ the judge said.

A PTI report said that during the hearing of Ramkrishna’s anticipatory bail application before a special CBI court in the capital, the agency told the court that in order to extract the actual facts, the services of a senior forensic psychologist of the CFSL, CBI, New Delhi were also utilised.

The officials said that the former NSE CEO was “evasive’’ in her responses related to the co-location scam case.

The agency had conducted Ramkrishna’s questioning for three days during which she allegedly did not give proper responses to the investigators.

In February, the agency had arrested former NSE group operating officer Anand Subramanian after expanding its probe into the co-location scam in the exchange.

This came after a Sebi report last month referred to a mysterious “yogi” guiding some of the crucial decisions of Ramkrishna.

Though a forensic audit conducted by the bourse allegedly said that Subramanian was the yogi, Sebi did not think so.

Ramkrishna, who had succeeded former NSE CEO Ravi Narain in 2013, had appointed Subramanian as her adviser, who was later elevated as the group operating officer.