Replying to former BSF Director General Prakash Singh, who had complained to CVC on behalf of NGO India Rejuvenation Initiative, CBI refuted the allegations of tardy probe.
"A person as knowledgeable and battle hardened as you have chosen to cast aspersions on the functioning of the CBI without taking pains to ascertain the facts from CBI where a large number of officers are known to you," CBI said in a strongly worded response.
Giving case by case rebuttal of allegations, CBI said the agency is doing whatever is required under the law.
"CBI is fully aware of its Constitutional and legal obligations," it said.
Also Read
The letter said the agency can proceed only when it gets enough evidence which is legally tenable.
Singh had alleged tardy probe in select high profile corruption cases including of disproportionate assets against Mayawati and Yadav.
In his letter to CBI Director Ranjit Sinha, Singh alleged that the investigating agency was "dragging its feet" in many cases.