"He (Vikas Yadav) is in jail from last 12 and half years, without being out from the prison for a single day.
"His act was not so brutal or gruesome for which death penalty is the only remedy," a special bench of justices Gita Mittal and J R Midha was told by the counsel appearing for Vikas.
Earlier, the victim's mother and Delhi Police, who had concluded their arguments, had demanded death for the trio terming their offence to be rarest of rare.
The counsel for Vikas also said that the lenient view can be taken as there are all chances of his reformation.
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"There is a clear report of the probation officers, who have visited his house, neighbours and relatives that there is all likelihood of his reformation," the counsel argued.
"In over 24 countries in Europe, there are provisions of death penalty but hardly any people there is awarded such kind of punishments. This practice is being adopted from decades," the counsel said, adding that the Supreme Court is also preferring to commute death sentences to life term.