Nalini Sriharan, a life convict in the Rajiv Gandhi assassination case, was shifted back to the Vellore special prison amid tight police security on Wednesday morning.
She had been shifted to the Puzhal prison near Chennai on June 28 last year after complaining of harassment by officials of the Special Prison for Women, Vellore, and stating that her life was under threat.
Nalini had been accused of illegally using a mobile phone while she was in the Vellore prison.
Nalini was one of the 26 persons who were convicted and sentenced to death by the special court at Poonamallee in January 1998.
The death sentence against four persons, including Nalini and her husband Sriharan alias Murugan, was upheld by the Supreme Court in 1999.
While all the four death convicts appealed to the Governor for clemency, the death sentence of Nalini alone was commuted to life sentence on April 24, 2000.
The President rejected the clemency petitions of Murugan, Santhan and Perarivalan recently.
Under these circumstances, Nalini had sent a request to the State government to shift her from the Puzhal prison to the Special Prison for Women, Vellore, so that she could meet her husband who is lodged in the Central Prison for Men, Vellore.