The CBI Director also sounded optimistic as he claimed that efforts were on to bring back Dawood Ibrahim and all the agencies of the government are working towards it.
"I cannot give any time-frame (on bringing back Dawood) but no one should have any doubt... In this case (on Chhota Rajan), we got cooperation from many international agencies. It was not a surrender," he said at Agenda Aaj Tak.
Sinha said if similar cooperation is received from other countries, efforts to bring Dawood will also be successful. He refused to share further details, saying divulging such operational details can jeopardise the efforts.
Sinha, who took over as CBI chief December last year, tried to distance himself from the scathing criticism the agency faced from the Supreme Court during the tenure of his predecessor, saying "that was then, not now".
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"Do you ask Virat why we lost during Dhoni's captaincy or ask Dhoni why we lost during Sunil Gavaskar's captaincy," he said, adding that he can take onus of decisions taken during his tenure, and not his predecessors.
Even during the tenure of Anil Sinha, the agency took some controversial decisions like not appealing against a court order discharging the president of a political party from serious charges levelled by the CBI, and conducting searches at the residence of Himachal Pradesh Chief Minister on the day of marriage of his daughter.
"There were no elaborate arrangements for the marriage and even people of Shimla did not know about any such function. How can CBI know about it," he said, answering a query of the searches carried out by the agency at Singh's residence.
Sinha reiterated the demand to have a law that empowers the agency to take over probe in crimes at national level.
"We should be concerned about tackling organised crimes more than anything else," he said.