Established in Bachchan Singh v. State of Punjab (1980), which upheld the constitutional validity of the death penalty but significantly limited its application.

The court must consider both aggravating circumstances (related to the crime's brutality, motive, manner of execution) and mitigating circumstances (related to the criminal's background, mental state, potential for reform, socio-economic conditions).

The doctrine emphasizes that the death penalty should be an exception, not the rule, and only imposed when the alternative of life imprisonment is 'unquestionably foreclosed.'

In Machhi Singh v. State of Punjab (1983), the Supreme Court laid down five categories of cases where the death penalty could be considered, including the manner of committing murder, motive, anti-social or socially abhorrent nature of the crime, magnitude of the crime, and personality of the victim.

The focus is on balancing the 'crime test' heinousness of the crime and the 'criminal test' absence of mitigating factors and no possibility of reform.

It aims to reduce judicial discretion and ensure consistency in sentencing for capital offenses, while reflecting a cautious approach to capital punishment.

The doctrine is a judicial innovation to reconcile the constitutional validity of the death penalty with the fundamental right to life under Article 21.

Established in Bachchan Singh v. State of Punjab (1980), which upheld the constitutional validity of the death penalty but significantly limited its application.

The court must consider both aggravating circumstances (related to the crime's brutality, motive, manner of execution) and mitigating circumstances (related to the criminal's background, mental state, potential for reform, socio-economic conditions).

The doctrine emphasizes that the death penalty should be an exception, not the rule, and only imposed when the alternative of life imprisonment is 'unquestionably foreclosed.'

In Machhi Singh v. State of Punjab (1983), the Supreme Court laid down five categories of cases where the death penalty could be considered, including the manner of committing murder, motive, anti-social or socially abhorrent nature of the crime, magnitude of the crime, and personality of the victim.

The focus is on balancing the 'crime test' heinousness of the crime and the 'criminal test' absence of mitigating factors and no possibility of reform.

It aims to reduce judicial discretion and ensure consistency in sentencing for capital offenses, while reflecting a cautious approach to capital punishment.

The doctrine is a judicial innovation to reconcile the constitutional validity of the death penalty with the fundamental right to life under Article 21.