Roast Busters is a group of predominantly West Auckland youths whose members bragged online about having sex with drunk and underage girls. Members Joseph Parker and Beraiah Hales are said to be living undercover since their names and faces were made public.
It was confirmed last Friday that Tristan Burrow, the son of police Constable Craig Burrow, was associated with the group in 2011. He was interviewed by police and co-operated with the investigation, but has had no involvement since.
Police refused to answer specific questions about the investigation yesterday, including whether any new victims had come forward and whether they had spoken to any of the suspects since last week.
But in a statement they said Ms Malthus would lead a multi-agency team on Operation Clover.
Detective Superintendent Andy Lovelock, called in last week to "cast a fresh set of eyes" on the case, will retain overall oversight of the investigation.
Meanwhile, ACC is urging victims to come forward to access sexual assault support including counselling to help them make a decision about whether they wish to involve police.
If you would like to speak to ACC about what support is available, contact its Sensitive Claims Unit in confidence on 0800 735 566.