"It was big in the news but then it all went quiet. We thought everyone had clammed up to protect a relative."
Mr Lebo said the family had moved from the Arawa Pl home soon after the child died.
Yesterday he said he and his wife were "quite surprised" to learn of McGregor pleading guilty in the High Court at Wanganui to murdering Hinekawa.
"It's sad to find that out ... it's a shame a life has been lost, and justice must be done."
The other two triplets and their 5-year-old brother were taken into Child, Youth and Family care after the death.
It is believed Miss Topia and the children now live in Australia, but attempts to contact her yesterday were unsuccessful.
Social Development Minister Paula Bennett changed her travel plans after Hinekawa's death to include a visit to Wanganui, and yesterday told the Chronicle she found it unconscionable that any father could murder his newborn baby.
"Babies have no defences. They rely on the people closest to them to protect and love them, and baby Hinekawa deserved to be loved and protected and to grow up with her siblings.
"Like me, New Zealanders are sick to death of mongrels hurting babies, and I believe that's why the community is so supportive of the Children's Action Plan - we're making sweeping changes to put children ahead of adults as we protect them from abuse."
McGregor will be sentenced on December 18.