“1. Regarding the defendant’s statement, his foot made contact with Mr Collin’s head only once. This was when Mr Collins fell to the floor after being swung round by the defendant. According to the defendant’s account, he kicked out at Mr Collins as he fell. When he fell, Mr Collins hit his head on the ground and possibly also on a wall. 2. It is my opinion that the patterned injury to the right side of the forehead was inflicted by a forced contact between the sole of a shoe and Mr Collins’ face, such as a kick or a stamp. In my opinion, a moderate to severe force (on a subjective scale of mild to moderate to severe) is required to inflict this injury. It is not possible based on the injury pattern to comment on the position Mr Collins was in at the time of the infliction of the injury. Thus, it cannot be excluded that the injury was inflicted while Mr Collins was falling. 3. The injuries to the back of Mr Collins’ head (injuries 29 and 30) can be the result of an impact onto a rough surface such as a wall or the ground. 4. Based on the injury pattern, the account of the defendant cannot be excluded.”
“A party producing a witness shall not be allowed to impeach his credit by general evidence of bad character; but he may, in case the witness shall, in the opinion of the judge, prove adverse, contradict him by other evidence, or, by leave of the judge, prove that he has made at other times a statement inconsistent with his present testimony…”
“Unfavourable and Hostile Witnesses: If a witness called by a party to prove a particular fact in issue or relevant to the issue fails to prove such fact or proves an opposite fact the party calling him may contradict him by calling other evidence, and is not thereby precluded from relying on those parts of such witness’s evidence as he does not contradict. If a witness appears to the judge to be hostile to the party calling him, that is to say, not desirous of telling the truth to the Court at the instance of the party calling him, the judge may in his discretion permit his examination by such party to be conducted in the manner of a cross-examination to the extent to which the judge considers necessary for the purpose of doing justice.”
“35. But it is not uncommon for there to be witnesses whose evidence is regarded by the prosecution as largely, or in part, worthy of belief and reliable but not wholly reliable. There may be good reason for the prosecution arriving at such a judgment. It is a normal human experience that people sometimes tell the truth about certain matters but may not be reliable about others, as the verdicts of juries from time to time suggest. There is no reason why a jury should not regard part of a witness’s evidence as true but take the position that they cannot rely upon the whole of that evidence. That not infrequently happens and it seems to have happened in the present case. 36. We know of no principle of law or justice which requires the prosecution to regard the whole of a witness’s evidence to be reliable before he can be called as a prosecution witness. If it is open to the prosecutor to form the view that part of a witness’s evidence is capable of belief, even though the prosecutor does not rely on another part of his evidence, then the prosecutor is entitled to exercise its discretion so as to call that witness. That must be so, since part of the witness’s evidence could be of assistance to the jury in performing its task, and it would therefore be contrary to the interests of justice to deprive them of that assistance. The prosecution in such circumstances is not to be prevented from calling such a witness.”
“39. So it is clear, in our view, that the prosecution may properly call a witness when they rely on one part of his evidence but not on another part. Whether they choose to call such a witness is a matter for their discretion, to be exercised on the principles which we have already set out. But that does not amount to an attack on their own witness’s credit. 40. In the present case the prosecution identified a rational explanation for not relying on part of Barry Cairns’ evidence, namely his relationship with his wife and with his friend Hussain. That explanation did not cast doubt on his evidence about Chaudhary and Zaidi.”
“When prosecution counsel in his final speech started to cast doubt upon the credit of his own witness, he was stopped by the judge on the normal principle that a party is not entitled to attack the credit of its own witness unless it seeks, and is permitted, to treat that witness as hostile. That is a principle which received statutory recognition in theCriminal Procedure Act 1865 (Denman’s Act), s. 3.”
“He may have said to you that he wished he hadn’t done it; he said to his solicitor that he was devastated. Has this man, as he has given his evidence to you, really shown any remorse? ”
“That means that in cases of this kind the court must in the end ask itself a subjective question, whether we are content to let the matter stand as it is, or whether there is not some lurking doubt in our minds which makes us wonder whether an injustice has been done. This is a reaction which may not be based strictly on the evidence as such; it is a reaction which can be produced by the general feel of the case as the court experiences it.”