20 Some time during the afternoon of Sunday 5 October 2008 the offender decided to kill the deceased and made preparations to carry out his objective. In his evidence before the jury, and again on sentence, the offender went to great lengths to implicate Allan Syphers as the person who provided him with the gun that was used to kill the deceased and the person who encouraged him to use it. He also said that Mr Syphers provided him with what he was told was a lethal dose of a narcotic to administer to the deceased as an alternate method of killing him. He said that Mr Syphers directed Mr Riley to drive him to the deceased's home. Although I am satisfied that Mr Riley did drive the offender to a designated place on the highway within half a kilometre of the deceased's home in Mr Syphers' car, and that after the killing he returned to collect him, I make no finding as to whether Mr Syphers had knowledge of those arrangements or whether he participated as an accessory before the fact to murder. While I have some doubts as to whether Mr Syphers was completely truthful in his evidence concerning his knowledge and involvement in the deceased's death, it is not a matter that has any bearing at all on the sentence to be imposed on this offender. I have not been invited by his counsel to reduce his sentence because of his offer to give evidence against Mr Syphers were he to be charged with being an accessory before the fact to murder. This is doubtless in recognition of the fact that on his client's behalf he could not have discharged the evidential burden of satisfying me of any of the various matters set out in the s 23(2) of the Crimes (Sentencing Procedure) Act 1999 such as might justify a reduction of sentence in the exercise of discretion. In that regard I note Senior Constable's Vallette's evidence that because of Mr Riley's suicide the day after the murder, the offender is the only source of evidence against Mr Syphers and, as an admitted perjurer and confessed murderer, he is not a person who, in her assessment, could be regarded as a reliable witness.
21 I am satisfied that the offender arrived at the deceased's home armed with a loaded rifle (probably obtained with Mr Riley's assistance) some time after 9 pm. I am also satisfied that he forced entry through the front door and, in that way, took the deceased completely by surprise. I reject his evidence that he walked in through the open front door after the deceased moved from the veranda as a result of the rain, and I reject his evidence that the damage to the front door occurred after the killing when he returned to collect items that he claimed to have left behind. Although it may be that the offender also had drugs and a syringe with him to simulate a drug overdose, I am not satisfied of that fact beyond reasonable doubt. I simply cannot accept the offender's evidence that he was able to inject the deceased whilst at the same time having him under his control at gun point, much less that the deceased allowed himself to be injected without apparently saying anything or, as the offender would have it, that he enjoyed the drug experience so much that he engaged in a civil conversation with the offender and shared a cigarette. I reject entirely the offender's account that with the air of conviviality he had created by introducing the drugs he considered leaving the house without harming the deceased, and that it was only when the deceased grabbed for a piece of turned wood to strike him that he pulled the trigger and shot him in the neck. While I cannot be certain as to how the deceased was shot, for sentencing purposes I am satisfied that the shooting was intentional and that it occurred in the course of the offender confronting the deceased with a loaded weapon, most likely in a failed attempt by the deceased to defend himself against the offender's stated intentions not to leave the house until the deceased was dead.
22 Either because of a defect in the rifle due to its age, or the angle of the bullet's entry, or both, the gunshot wound was not fatal. It passed through the soft tissues of the deceased's neck without coming into contact with any of the internal structures or the major blood vessels in the neck before lodging in his upper arm. Thereafter, however, the offender persevered with his intention to kill the deceased by beating him about the head with the butt of the rifle with such force that it shattered into pieces. I am satisfied that the very great majority of the 15 to 20 separate blunt trauma head injuries were inflicted whilst the deceased was lying face down on the concrete floor at the rear of his home in a state of deep unconsciousness as a result of a severe blow above his eye, sustained whilst he was upright, and which caused a depressed fracture to his skull from which brain matter protruded. While this blow alone would likely have caused death in time, because of the overlay of the massive head injuries inflicted thereafter, the forensic pathologist was unable to attribute any single blow as the cause of death. The deceased also suffered a fracture to his arm, a fractured rib and associated soft tissue injuries to his trunk and his limbs in the assault.
23 In his evidence the offender acknowledged that he inflicted all of the injuries revealed on autopsy, including the very severe injury to the deceased's forehead, but claimed to have a memory of only beating the deceased half a dozen times to the head as he lay helpless on the concrete floor. He said he inflicted the injuries in a state of extreme rage and hatred because the deceased had betrayed him by commencing a relationship with Ms Cavanagh, and because he believed she was using drugs at the deceased's suggestion or urging. Ms Cavanagh gave evidence that she did use drugs with the deceased but that she did so infrequently and of her own volition.