The Crown case
8 The Crown case was that the victims (Gerard Paine, Daniel Banks, Patrick Banks and David Carlile) were attending a party at a community centre in St Marys. At about 10.30 pm some person or persons threw bottles (and possibly eggs) towards the people at the party. Some of the victims followed some people to Adelaide Street, St Marys, but lost sight of them. About that time, three or four men (who it was not suggested were the bottle throwers) came outside a house in Adelaide Street and had a conversation with two of the victims. At that stage none of those men appeared to be holding anything. Some of the victims started to walk away but then noticed a large group of people, some of whom were carrying "poles" running out of the driveway of the Adelaide Street house towards them.
9 One of the victims walked back towards the men who were initially out the front of the Adelaide Street house and "another ten guys". He had a short conversation with one of the males (allegedly one of the co-accused). He was then assaulted "at the gutter" of the road and suffered a number of injuries causing him to bleed profusely. He and the other victims ran to a park where they were attacked and suffered various injuries at the hands of persons they could not identify.
10 There was no dispute that the appellant had attended a party at the Adelaide Street house prior to the incident, or that he was present in the first group of males at the front of the house when the violence began. However, the Crown did not contend that all of the men at the Adelaide Street house, or all the men out the front of the house, joined a criminal enterprise to attack the victims.
11 As against the appellant, the Crown relied on the concept of joint criminal enterprise and evidence to establish the involvement of the appellant in that criminal enterprise.
12 The Crown case against the appellant was based on the evidence of a girl who was present at a party at the Adelaide Street house, Emily Spillane. She gave evidence that she had heard a person she was "pretty sure" was the appellant say that he was going to fight the males who had come to the front of the house, that she and another party-goer had immediately spoken with that person and attempted to dissuade him from that course, that the appellant then picked up a barbell and left through the back gate of the yard of the premises with three other men, who included the two co-accused.
13 The Crown also relied on DNA evidence. After the incident the police noticed two spots of what appeared to be blood on the appellant's shorts. DNA recovered from the appellant's pants was of the same profile as the DNA of one of the victims. The Crown led evidence that the DNA on the shorts likely came from blood.
The defence case
14 The defence case was, in summary, that:
(a) Ms Spillane was not certain that it was the appellant who was the person who said and did the things she referred to in her evidence; accordingly the jury must have had a reasonable doubt whether it was him;
(b) two witnesses testified that the appellant went out to the front of the house as part of the first group without anything in his hands; and
(c) the DNA evidence could only tend to prove that the appellant was standing nearby when the victim was struck and did not prove that he was involved in a joint criminal enterprise.
15 Accordingly, the defence case was that the jury should have had a reasonable doubt that the appellant walked to the front of the Adelaide Street house intending to fight or armed with a bar, and so should have had a reasonable doubt as to whether he joined a joint criminal enterprise to attack the victims.