185. Good faith defined. A publication of defamatory matter shall not be deemed to have been made in good faith by a person, within the meaning of section 184, if it is made to appear either— (a) that the matter was untrue and that he or she did not believe it to be true; (b) that the matter was untrue and that he or she published it without having taken reasonable care to ascertain whether it was true or false; or (c) that in publishing the matter, he or she acted with intent to injure the person defamed in a substantially greater degree or substantially otherwise than was reasonably necessary for the interest of the public or for the protection of the private right or interest in respect of which he or she claims to be privileged. 186. Presumption as to good faith. If it is proved on behalf of the accused person that the defamatory matter was published under such circumstances that the publication would have been justified if made in good faith, the publication shall be presumed to have been made in good faith until the contrary is made to appear, either from the libel itself, or from the evidence given on behalf of the accused person or from evidence given on the part of the prosecution. Division IV—Offences against the person. CHAPTER XVIII—MURDER AND MANSLAUGHTER. 187. Manslaughter. (1) Any person who by an unlawful act or omission causes the death of another person commits the felony termed manslaughter. (2) An unlawful omission is an omission amounting to culpable negligence to discharge a duty tending to the preservation of life or health, whether such omission is or is not accompanied by an intention to cause death or bodily harm.