Ms Collins had said she could not do anything because there might be an appeal to the Privy Council, but no appeal had been lodged so there was nothing stopping the minister, Mr Little said.
"Any minister of justice should be seriously concerned whenever there is a credible claim of miscarriage of justice and should act promptly to establish the facts and ensure public confidence in the police and judiciary is not unnecessarily undermined.
"The fact that the Teina Pora case is just one of several high profile cases of alleged miscarriage of justice confirms my view that New Zealand should now consider setting up an equivalent to the UK Criminal Cases Review Commission as a standing Fully independent body to deal with such cases."
The Weekend Herald first revealed in May last year that the detective whose expert testimony convicted Malcolm Rewa of raping Ms Burdett believed Pora was wrongly convicted of her murder.
In 1996, DNA testing showed the semen inside Ms Burdett, who was killed in 1992, belonged to Rewa, a serial rapist who was unknown at the time of Pora's trial but was convicted in 1998 of raping her.
Detective Dave Henwood, a multi-award-winning criminal profiler, said there were no doubts in his mind Rewa committed the crime alone, and that Pora was innocent.
Since then, more doubt has been cast on Pora's conviction, including revelations on TV3's Third Degree this week that a woman raped by Rewa two weeks before the attack on Ms Burdett said she, too, believed an innocent man was in jail.
The programme also discovered that before Pora's first trial, police had believed Ms Burdett was attacked by a serial rapist but did not disclose this to Pora's lawyers.