Former head of the National Stock Exchange (NSE) Chitra Ramkrishna was arrested by the CBI from Delhi late Sunday evening in connection with the co-location scam case. This comes a day after a Delhi court on Saturday dismissed the pre-arrest bail plea of Ramkrishna in the co-location case, pulling up the CBI for inaction and being lackadaisical in the probe against the accused in the last four years. The co-location case pertains to the allegations that certain brokers received unfair preferential access to NSE servers. Stock prices on the trading screen keep changing every microsecond.Special Judge Sanjeev Aggarwal had also observed that market regulator SEBI has been “too kind” to the accused as he dismissed the anticipatory bail application of Ramkrishna, noting that she is facing grave allegations and her sustained custodial interrogation would be required to dig out the truth.The CBI had recently questioned Ramkrishna in the matter. The Income Tax (IT) Department earlier raided various premises linked to Ramkrishna in Mumbai and Chennai. Ramkrishna has also been on the radar of the market regulator Securities and Exchange Board of India (SEBI).(With PTI inputs)Read all the Latest News, Breaking News and Assembly Elections Live Updates here.