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 police had sought the death penalty in a horrific but familiar crime. Its handling by the local authorities had outraged the nation.

More individuals should have been questioned in the case while working conditions in India’s hospitals remain abysmal, analysts say.