Appeal on the question of whether the Court of Appeal was correct to treat defence of sexsomnia as insane automatism – Crimes Act 1961, s 23; New Zealand Bill of Rights Act 1990, ss 6, 25(c) and (e) – proper interpretation of phrase “disease of the mind” in s 23 Crimes Act – are limits on the presumption of innocence (s 25(c) Bill of Rights) inherent in reverse onus in s 23 Crimes Act demonstrably justified?