Former Serious Fraud Office boss Adam Feeley says it was inevitable the Chisholm inquiry would clear the behaviour of former cabinet minister Judith Collins.
Last week, government inquiry head High Court judge Justice Lester Chisholm reported there was no evidence linking former Ms Collins with a blog campaign to undermine the former SFO chief executive.
In August, in the lead-up to the election, Ms Collins resigned her ministerial portfolios after an October 2011 email from Whale Oil blogger Cameron Slater emerged claiming she was "gunning" for Mr Feeley while justice minister.
Yesterday, Mr Feeley, who left the SFO to take the helm at the Queenstown Lakes District Council, told the Otago Daily Times the Chisholm inquiry's terms of reference were very narrow.
"You've got a report that's given within the constraints of fairly tightly-defined terms of reference, so in that sense, yes [it was inevitable]."