Criminal evidence and procedure – Mutual corroboration – Moorov doctrine. High Court of Justiciary: Allowing an appeal against conviction by a teacher who was convicted of sexual offences committed against two pupils, the second complainer being the nephew of the first complainer and the temporal gap between the offences being 17 years, the court held that the time gap between the two charges was substantial; the family relationship appeared to be incidental, rather than a factor precipitating or facilitating the conduct; the argument that the appellant lacked opportunity to commit such offences was difficult to accept; and there were no similarities in the conduct of such a striking or extraordinary nature which might suggest that the two offences were part of the same course of conduct, systematically pursued by the appellant.