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.

Sentencing Roy to life in prison, a Kolkata court said Monday that the case didn’t meet the criteria to be classified as ‘rarest of rare’, and therefore, did not merit death penalty.

The trail court had sought death penalty for Sanjay Roy but was turned down by the trail court, where Additional District and Sessions Judge Anirban Das said that the crime did not fall under the ‘rarest of the rare’ category.