In this case, the accused gave evidence. He didn't have to. He was quite at liberty not to give evidence. The accused chose to give evidence and he submitted himself to the cross-examination of Ms Mattocks for the State.
The fact that the accused gave evidence, however, does not in any way detract from the important principles that the onus is on the State to prove the charge that it presents against the accused, and that the accused is presumed innocent until the charges against him have been proved beyond a reasonable doubt.
It may be that you believe all of the accused's evidence in respect of the charges that you're considering. In that event, you would acquit him of those charges. Even if you prefer the evidence of the prosecution, you cannot deliver a verdict of guilty unless you're satisfied beyond reasonable doubt as to the truth of that evidence.
Even if you were not to believe the accused's evidence, you cannot find an issue against the accused contrary to his evidence, if his evidence has given ... rise to a reasonable doubt on that issue. It's important for you to remember that the question for you to consider, is whether on all the evidence before you, has the State proved the charge you are considering beyond reasonable doubt.
If the accused's evidence has given rise to a reasonable doubt, then he's entitled to the benefit of that, and you cannot convict him of that charge. Further, even if you don't accept the accused's evidence and you reject it entirely, it doesn't automatically follow that your verdict is one of guilty. If you don't believe the accused, then you put his evidence to one side, and then you look at the rest of the evidence.
You'll remember that the accused doesn't have to prove anything. So you look at the rest of the evidence and the question for you is this and it remains this question throughout. Has the State, on the basis of the evidence that you do accept, proved the accused's guilt beyond a reasonable doubt? That is the task (ts 347 ‑ 348).