KEY POINTS:
Chris Kahui was urged by police to reveal what happened to his twin sons - but he never confessed, instead telling detectives: "I've never laid a hand on my kids."
Shortly before he was arrested and charged with murdering his 3-month-old sons, Kahui had a lengthy interview with Detective Sergeant Chris Barry.
Kahui's trial at the High Court at Auckland is into its third week, and the interview was yesterday played to the jury.
In it, he was repeatedly told to think about the effect the murders had on his family and friends - the broken relationships, the children who had been taken away from them and the suspicion that they could be the ones responsible for killing the babies.
Mr Barry said that if Kahui injuried the infants, he needed to sort it out so others weren't suspected.
But his answer was the same, that he had never hurt his kids.
Mr Barry said that, despite Kahui's denials, he thought Kahui was responsible after reaching "breaking point".
Earlier, Kahui was asked if he thought any of his family could have hurt the boys.
Mr Barry asked Kahui if he blamed the boys' mother, Macsyna King, for what happened to them.
He replied that he "did in a way" because he didn't know what had happened to them.
Asked if he thought she had inflicted the fatal injuries he said: " ... she could have done. Yeah."
Mr Barry said either someone planned to do it or they had just "lost control".
Kahui had earlier said Ms King was a good mother who did everything for the boys, washing them, feeding them and putting them to bed.
"She wasn't a lazy mother."
He was then repeatedly asked who he thought inflicted the injuries.
Mr Barry put it to him that the other adults in the house could have hurt the boys and be lying about it.
Kahui said he didn't think that was possible.
"It's not fair for me to say ... I can't picture anyone doing it."
He was asked about Ms King's brother, Stuart King, and Kahui's sister, Mona Kahui, who lived in the house and were there at the time the babies were believed to have been injured.
Kahui said he trusted Stuart and that he was a good guy, and that he didn't think it was Mona either.
The failure of anyone to ring an ambulance when baby Cru stopped breathing was the focus of repeated questioning.
Mr Barry suggested to Kahui that he didn't want to call an ambulance because he knew the babies were injured and he would be caught.
Kahui said that wasn't true and he had never hurt his sons.
Asked why he never accompanied Ms King to the hospital with the injured twins Kahui said it was because he was "too amped - too angry". He said he was being blamed for everything by everyone. "'Cos of my dad, 'cos of my sister, 'cos of Macs."
Mr Barry accused Kahui of looking for sympathy by telling people he should hand himself in, but Kahui said he blamed himself for what happened.
" ... I was their father and I couldn't protect them. I didn't know what the hell was going on."
The trial continues.
