CBI had sought death penalty for convict Sanjay Roy in the RG Kar rape and murder case, however, the trial court sentenced him to life

The CBI is likely to file the appeal against the Sealdah court order by Friday with detailed arguments in favour of capital punishment, they said.

Roy was on January 18 convicted under charges which entailed a minimum sentence of life imprisonment, while the maximum could be capital punishment.

An Indian court on Monday sentenced a police volunteer to life imprisonment for the rape and murder of an on-duty doctor last year – a crime that sparked nationwide protests. Sanjay Roy, 33, plans to appeal the judgment in a higher court.

An Indian court awarded a life sentence on Monday to a police volunteer convicted of the rape and murder of a junior doctor at the hospital where she worked in the eastern city of Kolkata, rejecting demands for the death penalty and saying it was not a rare crime.

The CBI will file an appeal before the Calcutta High Court, seeking death sentence for Sanjay Roy, who was sentenced to "life imprisonment until death" by a Sealdah court in

India's West Bengal state launched an appeal on Tuesday to overturn a life sentence in favour of the death penalty for a police volunteer convicted of the rape and murder of a junior doctor, a senior lawyer aware of the development said.

The Bengal government has moved a division bench to file an appeal for the death penalty for the convict, Sanjay Roy, in the RG Kar rape-murder case.