The inquiry into the process undertaken by the State Services Commission into Wally Haumaha's appointment as new Deputy Commissioner of Police will look at what information they held about him before he was given the role.
Speaking at a press conference, Acting Prime Minister Winston Peters told media the Haumaha would not be stood down while the inquiry took place.
Peters announced the inquiry earlier today following a Herald investigation which revealed Louise Nicholas' anger at his promotion.
Haumaha was friends with the men she accused of raping her and continued to support them after the scandal broke.
The terms of reference into the inquiry would focus on the State Services Commission's appointment process and whether all relevant information was appropriately provided to or gathered by them during the appointment process and if not, why not.