Chris Kahui thought his partner Macsyna King must have killed their three-month-old twin sons because he believed she was having affairs with two other family members, a coronial inquest into their deaths has been told.
An interim suppression order was partially lifted this morning by coroner Garry Evans on the reason why Chris Kahui yesterday said he had changed his mind that Ms King "might have" to "must have" killed the twins, Chris and Cru.
It can now be reported that it was because Mr Kahui found out that Ms King was allegedly having an intimate relationship with two other family members.
The details of the family members concerned remained suppressed.
Mr Kahui told the inquest yesterday he had never done anything to hurt his children.
He never hit them, hurt them or shook them in any way.
Mr Kahui said he thought Ms King must have caused their fatal injuries.
"I have never done anything to hurt my children. I never asked Macsyna if she did it. I didn't do it so I thought she must have."
Mr Kahui denied he had ever used methamphetamine or cannabis, but admitted to occasionally drinking alcohol.
In the weeks leading up to the twins' deaths, Mr Kahui spent almost every day in hospital with his mother who was seriously ill with pneumonia, so Ms King looked after the twins most of the time.
He did not know she was using methamphetamine when the twins were at home, he said.
Cru and Chris died in hospital from severe head injuries in June 2006.
Mr Kahui was found not guilty of their murders in a High Court trial in 2008, at which his lawyers said Ms King killed them.
Ms King has denied she caused the injuries which led to the babies' deaths.
Mr Kahui will continuing to give his version of events at the inquest today.
