Nothing is an offence which is done by any person who by reason of a mistake of fact and not by reason of a mistake of law in good faith believes himself to be justified by law in doing it.
This view was followed in Bonda Kui v. Emperor AIR 1943 Pat 64 a case in Which a woman, in the middle of the night, saw a form, apparently human, dancing in a state of complete nudity with a broomstick tied on one side and a torn mat around the waist. The woman, taking the form to be that of an evil spirit or a thing which consumes human beings, removed her own clothes and with repeated blows by a hatchet felled the thing to the ground. Examinationshowed, however, that she had killed a human being who was the wife of her husband's brother. The conviction and sentence of the accused woman under Section 304 of the Indian Penal Code were set aside, on the ground that she was fully protected by the provisions of Section 79 'ibid', inasmuch as the statements made by her from time to time, which constituted the only evidence in the case, demonstrated conclusively that she thought that she was, by a mistake of fact, justified In killing the deceased whom she did not consider to be a human being, but a thing which devoured human beings.
Bombay High Court
Chirangi vs State on 19 February, 1952
Equivalent citations: 1952 CriLJ 1212