Mr Doval, who was delivering a lecture at Mumbai's Yashvantrao Chavan Centre, said, "It was completely wrong to say India could not catch Tiger so caught Yakub. Yakub and Tiger are standalone. Inter linkage is incorrect."
The execution of Yakub Memon last week triggered a debate, with a section of civil society -- including politicians and legal personalities -- petitioning for the commutation of his death sentence.
The sentence was carried out on the morning of July 30 - barely two hours after the Supreme Court opened its doors in the middle of the night to take a decision on his plea.
Regarding the bigger debate over capital punishment, Mr Doval said it was a "discourse of conflict of values".
"Someone tweeted me a statement by a leader in the evening, saying state-sponsored killing diminishes us all and reduces us to murderers. This argument means anyone acting in defence reduces himself to murderers," Mr Doval said.
Without naming the leader - former Union minister Shashi Tharoor, who made the remark after Memon's execution - Mr Doval pointed out that the state "had to protect itself"
"You cannot say someone has the freedom to carry out a terrorist act, but the state does not have the right to use its coercive instruments to deny him his life," he added.
Asked if he was justifying violence by the state, he replied, "Yes absolutely. Violence is justifiable for maintaining statecraft but with riders. Should it come to protecting the interest of the state, those interests are priority. The nation should stop at nothing to protect its interest."
Get Breaking news, live coverage, and Latest News from India and around the world on NDTV.com. Catch all the Live TV action on NDTV 24x7 and NDTV India. Like us on Facebook or follow us on Twitter and Instagram for latest news and live news updates.