A 21-year-old man has been charged with murder.
Detective Inspector Scott Beard says four arrests have now been made in the investigation.
In the latest, a 53-year-old man was arrested near Te Awamutu and charged with being an accessory after the fact to murder.
A 32-year-old man arrested in Auckland faces the same charge.
The men are expected to appear today in the Hamilton and Auckland District Courts respectively.
The investigation is ongoing.
– RNZ