The uncle of the Kahui twins has been accused of lying to police about his movements and that of his wife and Macsyna King the night before the twins were admitted to hospital.
Friday is the end of the first two weeks of an inquest into the deaths of Chris and Cru Kahui, aged three months.
Their father Chris Kahui was acquitted of their murders in 2008.
The uncle of the Kahui twins, Pou Hepi, made a statement to police in June 2006 saying he got home about 7pm the night before the twins were admitted to hospital.
He told police his wife and her sister Macsyna King, were at home until about 8pm or 9pm that night.
But Mr Kahui's lawyer, Christopher Wilkinson-Smith, says new cellphone records, not available at the time, suggest he lied.
Mr Wilkinson-Smith accused Mr Hepi of lying to police about what happened the night before they were admitted to hospital.
He suggested Mr Hepi did this to hide what Ms King's real movements were that night.
Mr Hepi denied this.