37-year-old Nalini shot into prominence recently after Priyanka Vadra, daughter of Rajiv Gandhi, met her in Vellore prison where she is undergoing imprisonment.

Nalini had moved the Madras High Court in April after her plea for release on the grounds of good conduct in the prison was rejected by an advisory board last year. The board's decision was also accepted by the Tamil Nadu Government.

Nalini was initially sentenced to death along with her husband Murugan and two others in the case. Nalini's capital punishment was later commuted to life imprisonment following an appeal on humanitarian grounds by Congress President Sonia Gandhi after she delivered a baby girl in the Vellore prison.

Citing a Supreme Court judgement in the case, Swamy said Nalini did not deserve any mercy despite being a woman. Priyanka had met Nalini at the Vellore Central prison on March 19, creating a flutter.

Priyanka had described her meeting as deeply personal and her way of coming to peace with the violence and the loss she had experienced when her father was assassinated.