A long-time supporter of the convicted child molester Peter Ellis says the case is a running sore in New Zealand's legal history.
Ellis served seven years of a ten-year sentence after a jury in 1993 found him guilty of sexually abusing children at a Christchurch creche.
He has always maintained his innocence.
Author Lynley Hood and former National Party leader Don Brash have written to the new Justice Minister, Amy Adams, asking for an independent inquiry.
Dr Hood, who wrote the book A City Possessed about the case, said it was time to undo the wrongs done in the case.
"The case is a running sore in our New Zealand legal history. There's no evidence that any crime was ever committed but Peter Ellis remains a convicted criminal."
Dr Hood said an overseas judge would be needed for any inquiry into his case.
She said Peter Ellis had been before too many New Zealand judges for a local inquiry to be impartial.
"Our own justice system has repeatedly failed to correct its own mistakes and so many of our judges have been involved."
The Minister said she had not yet seen the request for an inquiry and was not making comment.