The Evidence
4 In the prosecution case evidence was called from Inspector Ruth Buggy, WorkCover Authority of New South Wales; Detective Senior Constable Glenn Ward, Newcastle Police Station; Detective Senior Constable Peter Rhodes, Raymond Terrace Police Station; Dr Timothy Lyons, Department of Forensic Medicine, Royal Newcastle Hospital; Mr William Munton, Farmer/Salesman; Mr Brian Graham, fitter and previously a director of Kentan Pty Limited; Mr Anthony Martin, TestSafe Australia; Associate Professor John Hilton, consultant in forensic medicine. The defendant called evidence from Mr Gary Lyons, joint managing director of Lyco Industries Pty Limited. Numerous documents were tendered, including photographs and videos.
5 The evidence showed that the defendant manufactured the machine at its premises in Victoria. When it sold the machine to Kentan in 1999, it was delivered by three different carriers to Kentan's premises at Hexham, in New South Wales. The contract contained a term that ownership in the machine did not pass until payment was received from Kentan.
6 Mr Hayward was fatally injured on 23 May 1999, at Mr Munton's property, where he was employed to operate the machine, which was attached to a tractor, in a fence building operation. Mr Hayward was working with Mr Owen Suters, who was driving the tractor. They were both employed as casuals. They were both inexperienced in the work, having first been trained by Mr Munton on a non-paid training day on 15 May and having first performed the work for several hours on 22 May.
7 On 23 May, Mr Munton supervised the work until he left Mr Hayward and Mr Suters for some 15 minutes, to gather various supplies. It was while the two employees were working unsupervised that Mr Hayward was injured. Mr Suters was so affected by what had occurred that he was hospitalised and was unable to provide an account of what had happened that day, until some time later.
8 The account given was that he and Mr Hayward had completed driving in a post, and Mr Hayward had given the OK for Mr Suters to drive to the next post. Mr Suters commenced climbing into the tractor and on looking over his shoulder, saw Mr Hayward on the ground and went to his aid.
9 The opinion of those investigating the accident was that Mr Hayward must have operated the hammer in order to attempt to straighten a post. While doing so, he put his head on the post, reached around the machine's guard and accidentally engaged the lever which released the hammer, resulting in a fatal injury, when the 600lb hammer came into contact with his head.
10 In a report to the coroner, Inspector Buggy raised a number of possible scenarios in which the accident may have occurred. They included that Mr Hayward rested his head on the post and reached around the guard, mistakenly engaging the lever which caused the hammer to fall on his head. In cross examination, she agreed that there were other possible scenarios, including that Mr Hayward was struck by the guard, when Mr Suters had mistakenly engaged a lever in the tractor, which caused the entire three point hammer unit attached to the back of the tractor to fall, striking Mr Hayward on the head and causing his head to hit the post, as he fell to the ground.
11 Dr Lyons prepared an autopsy report. He also favoured the theory that death had been caused by the hammer striking Mr Hayward's head, when he reached around the guard and engaged the control lever. In cross examination he also agreed, however, that another possibility, which could not be excluded, was that Mr Hayward was struck by the falling three point unit, although Dr Lyons preferred his theory, for reasons which he explained. Dr Lyons had given similar evidence in the coronial proceedings which had followed Mr Hayward's death. Dr Hilton took the view that Mr Hayward's injuries were more consistent with having been struck by the falling three point unit, than having been struck by the hammer. He could not, however, exclude the other possibility, which Dr Lyons favoured.
12 There were no eyewitnesses to the accident. Mr Suters was not called to give evidence, the prosecutor having been unable to locate him. It is not possible on the evidence to determine how Mr Hayward's death was caused. There is more than one possibility. As the authorities have made clear, however, it is unnecessary to come to any final conclusion about the cause of an accident when considering a charge such as this. It is the risk to safety in question which must be considered (See WorkCover Authority of New South Wales Inspector Hopkins v Profab Industries Pty Ltd (1999) 90 IR 119).
The section 18(1)(a) charge