63 For similar reasons, R v Power, which was referred to by the learned judge, should not be regarded as an authority for the proposition that mere statement of a preference for a witness is sufficient. Admittedly, Perry J, with whom the other members of the Court of Criminal Appeal of South Australia agreed, said at par59 that in the circumstances of the case, there was no requirement that the trial judge should attempt to give a detailed explanation for the decision to prefer the evidence of one witness against that of another, but that comment was made in the context of some reasons having been given by the trial judge. The case concerned charges of four counts of unlawful sexual intercourse with a person under the age of 12 years. In his reasons, the trial judge said that he was most impressed with the complainant as a witness and that he had no doubt that she was telling the truth. He said that he found the accused a most unimpressive witness. He also referred to evidence that a few hours after being charged and placed in custody, the accused's de facto wife asked him did he do "this", to which the accused replied that he did, and when asked, "Why?" he said, "I don't know, but I need help". His evidence was that all he was admitting to was that he had touched the girl but nothing else. The learned judge said that he rejected that explanation, and also his explanation for a letter of apology to the complainant for what he had done to her, and noted that his denials to police of doing anything improper, in the light of those admissions, did not give his Honour confidence as to the truth of the evidence he had given in court. The circumstances of that case bear no comparison with the circumstances of this case, where no reasons for preferring one witness to the evidence of another were given.