"However, if you are satisfied of that fact, you must then consider three other questions. The first is, was there an act of violence? Ladies and gentlemen, I direct you, as a matter of law, that the introduction of the knife into this affray, for the purpose of threatening or intimidating, or for the purpose of stabbing another, is an act of violence. It constitutes a form of assault. If you find that Escalante presented the knife for the purpose of threatening or intimidating Hillam, or for the purpose of stabbing him, that constitutes an act of violence. As you will hear in a moment, that is the act of violence upon which the prosecution relies.
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> The next matter is whether the act of violence was intentional. You may think that the presenting of the knife and use of it requires a deliberate and intentional act. It is not something which inadvertently or accidentally occurs. It is for you to determine whether the knife was intentionally presented and used.
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> The next question is whether the act of violence caused Bourne's death. Ladies and gentlemen, the law takes a commonsense view about causation. It looks to see if there is a causal link or a causal connection between one act and another. Did one act cause another to occur? The act does not have to be the sole cause of the other act occurring. It is enough if it is a substantial cause. It is enough if it is shown that, but for that one event, all the other events would not have happened as they did.
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> It is the Crown case that if the knife had not been presented and used at the commencement of this attempted armed robbery, the death of Bourne could not have occurred. It says that, having presented the knife, Escalante used it to stab Hillam and then to stab Bourne. The Crown says he was attacking both for the purpose of the armed robbery, or for the purpose of extricating themselves from it. The defence says there is no possible causal link between the presenting of the knife at that early stage in the robbery, and the later stabbing of Bourne. It says that Escalante had become very aggressive, that he was acting quite independently of the others, and that he made a separate decision to stab Bourne.
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> You will decide, ladies and gentlemen, whether you are satisfied that the presenting of the knife at the very outset of this attempted armed robbery caused Bourne's death.
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> If you are satisfied the act of violence was committed whilst all the accused were in the course of the attempted armed robbery, or extricating themselves from it, there are two alternative routes by which it is open for you to find these accused guilty of statutory murder. Again, it is either by the route of joint enterprise, or by the route of aiding and abetting.
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> As to joint enterprise, if you are satisfied that all of the accused had the common purpose that they would roll or rob Hillam, and for the purpose of their joint enterprise they would be armed with knives and a billiard ball, that they would use the knives and billiard ball if necessary to achieve their purpose in the course of the attempted armed robbery, the knives or billiard ball would be used to threaten or intimidate the victims. I realise that sounds very similar to the concept of joint enterprise in relation to common law murder, but it is different in that it is not necessary that any of the accused had an intention to cause death, or to cause grievous bodily harm, or contemplated as part of the joint enterprise the possibility that the use of the knives could result in an intentional inflicting of grievous bodily harm. That is the difference between them.
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> The case for both the Crown and the defence on this issue are very similar to those I have already outlined in relation to common law murder. As to joint enterprise, the prosecution says that all of this occurred in the course of the armed robbery, or whilst they were endeavouring to extricate themselves from it and remove themselves from the scene. The prosecution says that this all plainly occurred in the course of the armed robbery. Resistance, says the Crown, is always a real likelihood if you are going to commit an armed robbery. They met that resistance. Thus, they were inextricably involved in this attempt and had to escape from it. Thus, says the Crown, it is plain that all of this occurred in the course of the commission of the armed robbery, and that the initial presentation of the knife for its use to threaten or to stab Hillam was a cause of the death of Bourne.
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> The defence case, of course, is that by this time the robbery was all over, if it had ever started. The defence case is that it was quite unrealistic to suppose that by the time these events occurred the robbery - there was any commission of an attempted armed robbery. I remind you of what I have already said in relation to that in the context of either common law murder or the intent to cause grievous bodily harm.
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> The defence also says that in no respect is it fair to say or to conclude that the initial presenting of this knife at the early stage of attempted armed robbery, even if it was on foot, caused Bourne's death. Escalante was behaving, they said, quite aggressively and independently.
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> Similarly, in the case of the question whether they aided or abetted Escalante in the commission of the offence, this is much the same as in relation to the earlier offences. The prosecution case is that they did aid and abet, and that they both willingly engaged in the attempted armed robbery, and that indicates their intent.
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> The defence case is that there was a fight, each defending the other; they had no idea that knives would be used in the fight. Mkoka, indeed, had thrown his away. All they were doing was acting in their own defence and in defence of each other."