"[L]ogically there are two steps to be taken considering a conspiracy case. The first step is to consider whether you are satisfied beyond reasonable doubt that there was a conspiracy; that is, you have to be satisfied that at least two of the accused entered into an agreement to do an unlawful act; that is, to possess methylamphetamine with an intent to sell or supply it to another or others.
The second step, if you are satisfied that a conspiracy existed, is to consider separately the case relating to each accused; that is, to consider whether you are satisfied beyond reasonable doubt that the particular accused whose case you are considering was a party to the conspiracy. So to deal more fully with what I have just outlined, the first step the prosecution must take is to establish a common design, a combination or conspiracy; that is, a common agreement. The second step it has to take is to prove the participation of each accused in that common design, combination or conspiracy.
So the first step is to establish that there was a common design, combination or a conspiracy. The second step is to prove the participation of each accused in that common design and if you follow that twofold approach, it is unlikely that you will go wrong. The first question you must ask yourselves is whether the fact of a conspiracy has been satisfied. As I say, if you are satisfied that a conspiracy existed, then you go on to determine the participation or the extent of that participation, if any, of each accused in the conspiracy.
In considering the threshold question of whether a conspiracy has been established and then the further question of the extent of the participation, if any, of each of the accused in that conspiracy, you may rely upon two branches of evidence. In the first place, you can rely upon the evidence of the acts and statements of the accused whose case you are considering. In the second place, you can rely upon the evidence of the acts and statements of a co-accused from which the conclusion that there was a common design can be drawn. Although the separate acts and statements of each accused may be relevant only to the case against the individual, the collective acts of all three accused may in combination point to a common design, combination or conspiracy.
Upon a charge of conspiracy obviously proof may well consist in evidence of the separate acts of the individuals charged which, although separate acts, point to a common design, and when considered in combination, justify the conclusion that there must have been a combination or agreement as alleged in the indictment. Where the separate acts of the accused persons collectively point to a common design on the part of all or some of them those separate acts may be relied upon to establish the fact of a conspiracy.
So in deciding the first threshold question of whether the fact of a conspiracy has been proved you should consider the separate acts of each accused in examining the case against that person, and if necessary, the collective force of the separate acts of all three accused which may, when looked at together, point towards a common design. Assuming you are satisfied that there was a common design for conspiracy between at least two accused persons then you have to determine the second issue, namely, the involvement, if any, of each of the accused in the common design.
Once again, you take into account the separate acts of each accused, including in the case of the accused whose position you are considering, his or her acts post 2 June 2000. When considering that person's involvement you also take into account the collective force of the separate acts of all other accused persons before 2 June which may point to the participation of one or more of them in the common design you find proved. ..." (Emphasis added)