Forensic scientists are examining several houses in Wanganui as part of an investigation into the suspicious death of a boy.
Karl Perigo-Check, aged two years, died in Wanganui Hospital on Saturday from serious internal injuries.
He was the son of Karl Check who was jailed for the 2007 murder of Jhia Te Tua.
Detective Inspector Chris Bensemann says the police are working closely with the family of the boy, and with the hospital staff who treated him.
The police are investigating the cause of the injuries on behalf of the coroner.
The funeral will be held at 2.30pm on Friday at the Ranana Marae.