Former Accident Compensation Corporation chairman John Judge replaced his home computer just days after an inquiry into the leak of a sensitive email was announced, an analysis of parliamentary answers shows.
The date the computer was replaced has become a key point of dispute between Mr Judge and ACC Minister Judith Collins.
Ms Collins has accused him of hampering an investigation by the Privacy Commissioner into how an email which identified Bronwyn Pullar as the woman at the centre of a huge ACC privacy breach was leaked to the Herald on Sunday.
This week, the minister told the Herald that Mr Judge replaced his home computer after the announcement in late March that the investigation would be held and it might involve computer forensic analysis.
In response, Mr Judge said Ms Collins' comments were "pathetic" and motivated by recent unfavourable media coverage of ACC.