Police investigating the killing of Baby Ru believe they now know who disposed of vital evidence in the case.
The little boy died of blunt force injuries after being taken to Hutt Hospital in October last year.
He was just a few days short of his second birthday.
Investigators are still looking for items they say were deliberately removed from Poole Street property, including a piece of blue duvet cover, a CCTV system and the system's power back up system.
They maintain three people were in the house when Baby Ru was fatally injured, and they know what happened, but aren't telling the truth.
However, Detective Inspector Nick Pritchard can't say when there will be an arrest.
