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. ”
