WARNING: graphic content
A man who beat his friend to death with a cricket bat made "quite extraordinary" changes to his story to fit the evidence, the Crown says.
John Kenneth Collins, 39, is on trial before the High Court at Dunedin accused of the murder of 45-year-old Brent Andrew Bacon.
The victim was allegedly killed on February 4 in 2019 at a state-housing unit in Lock St in the Dunedin suburb of St Clair, but the bloody crime scene was only discovered two weeks later, shortly before the corpse was found hidden under a tree in a rural location 35km north of the city.
Collins said Bacon had become increasingly paranoid on the night in question, worried about a $500 drug debt, compounded by excessive cannabis use.
It led to a verbal spat, which quickly turned physical, the defendant said.
Giving evidence last week, Collins told the jury Bacon came at him brandishing a pair of scissors and he grabbed a cricket bat in response.
His intended warning blow connected with the victim's head and – allegedly fearful for his life – the defendant said he followed it up with at least two more blows, leaving the man on the floor bleeding heavily.
Collins and his partner, 32-year-old Aleisha Dawson, concealed the body in a sleeping bag, loaded it into Bacon's own Toyota van and drove off to dump it before they fled to Rotorua.
Crown prosecutor Richard Smith said that was not simply panic, there was a very clear reason behind the concealment.
"Mr Collins knew full well, for anyone who saw Mr Bacon's injuries, they couldn't be explained by self-defence. They couldn't be explained by anything other than murder," he said.
"The blood, the dislodged pieces of skull, and flesh, and pieces of hair... around the room."
The cricket bat used to kill Bacon was found in a rubbish bag in the kitchen of the Lock St flat, covered in his blood.
Under cross-examination, the defendant admitted he had forgotten it when they left the address.
"He was going to hide that too – remember that," Smith told the jury.
While Collins said he delivered three or four blows with the bat before it snapped in two, the prosecutor highlighted the evidence of pathologist Dr Charles Glenn.
The witness spoke about a large void in the left side of Bacon's skull, the result of "tremendous force", comparable to victims of gunshot wounds or plane crashes.
It was consistent with "many many blows", possibly dozens, Dr Glenn said.
Smith said the evidence suggested Mt Bacon had been lying on his left side, incapacitated, with his head against the floor while Collins was "standing above him raining blows down on his head like he's chopping wood".
He was critical of Collins' claims of self-defence.
"The force used must be reasonable in the circumstances," Smith said. "The law doesn't provide a blank cheque. There has to be some proportion to what you do."
Collins gave a police interview on February 20 in 2019 which departed significantly from the account given in court.
He put the changes down to being on a methamphetamine binge at the time and forgetting details.
Collins, in court, said Bacon was wielding scissors when he confronted him – a version raised for the first time during the trial.
Once he hit the victim, he said the man made a verbal threat to kill him; another new detail.
Smith said the changes to the defendant's story were "quite extraordinary".
"It's simply not plausible or believable that being questioned for murder, a really serious situation to find oneself in, that he would forget important details of the incident . . . forgot the very reason he claims he had to act in self-defence," he said.
"The Crown says Mr Collins has told so many lies and been so inconsistent you can totally reject his evidence . . . He's trying to change his case to fit the law and the evidence."
Smith also pointed to the significance of the forensic evidence, blood spatter on a wall, which suggested Bacon was attacked while sitting on a couch rather than standing as Collins had described.
Other staining, he said, were consistent with the defendant pursuing the victim around the lounge and "finishing him off".
While Smith said the Crown did not have to prove a motive, he aired some possible reasons behind the fatal beating.
Collins had money to buy meth that night but had no way of getting to Balclutha to get it. Maybe that had caused him frustration.
Smith said it may have been a "stand-over gone wrong"; an intimidatory bid to steal money from Bacon that went too far.
Or, the prosecutor considered, jealousy may have been the cause.
The victim had been smoking cannabis with Dawson that night and the defendant claimed the man had made "inappropriate" comments about his wife in the past.
"Perhaps Mr Collins saw something he didn't like," Smith said.
On the cricket bat was a bloody thumbprint from Bacon. The victim had broken bones in his hand.
The conclusion should be obvious, said Smith.
"It wasn't Mr Collins trying to defend himself, it was Mr Bacon," he told the jury of six men and six women.
"Mr Collins kept hitting Mr Bacon until the bat broke. He didn't exercise any restraint at all. He hit him as hard as he could, he didn't stop when he had the upper hand, he kept hitting him until the bat broke."
Len Andersen, QC, will close on behalf of the defence this afternoon.