New Zealand First leader Winston Peters, a former Foreign Minister, said it was scarcely believable that the mistake boiled down to a single official in the Ministry of Foreign Affairs and Trade.
"The Prime Minister and the Minister of Foreign Affairs claim to have been out of the loop. So what on earth were they briefed about? You're the Minister of Foreign Affairs. Red flags are coming up everywhere in front of your face, surely?
"The inquiry seeks to go straight to the civil servants, and crudely suggests that all the blame lies there. I don't believe for a moment that civil servants would be proceeding without tacit knowledge of the minister and the Prime Minister."
Read also: Why police removed bail conditions
A spokesperson for Mr McCully, who is in Europe, said the minister "fully expects that he, and staff from his office, will be interviewed" — but it is up to the head of the inquiry to conduct the inquiry as he chooses.
Former Treasury Secretary John Whitehead will lead the inquiry.
A ministerial inquiry is non-statutory and has no coercive powers.
Meanwhile, court documents released yesterday revealed that police removed the bail conditions, including an order to surrender his passport, a week before Rizalman left the country. He was meant to relinquish his passport by May 12, the same day the Malaysia High Commission met police and Mfat to discuss the case.
Wellington District Police Commander Superintendent Sam Hoyle said once diplomatic immunity was confirmed, bail conditions were no longer enforceable.
The spokesperson for Mr McCully said there was no ministerial involvement in the police decision.
The conditions were removed on May 15, and Rizalman flew back to Malaysia on May 22.