Right of self-defense

Definition and stakes

Paul Janet Elements of Morals

But, it will be objected, the right of self-defense, when ending in homicide, is justifiable only at the moment of the attack, and to ward off a sudden aggression itself threatening murder; but the deed once committed and the criminal in the hands of the law, there is no reason to fear a new aggression from him, and his chances of escape from justice through evasion are too few to justify the violation of a duty so absolute as the respect for human life.
Source: Gutenberg

Portrait of Johann Gottlieb Fichte Johann Gottlieb Fichte The Science of Rights — Book Third Concerning Municipal Law (1889)

When the right of self-defense has been exercised, whether upon provocation or by accident, the person who has exercised it is obliged to surrender himself to the government for justification, and to prove that he went beyond the pale of the laws of the state only because a case had arisen in which those laws could not be applied.
Source: Wikisource

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