Lawyers for Catherine Nevin have won access to Garda files they claim discredit prosecution witnesses at her murder trial.
The Court of Criminal Appeal granted her lawyers access to two garda files relating to chief prosecution witnesses Gerry Heapes and John Jones.
Along with William McLean, these are the men Nevin was convicted of soliciting to murder her husband.
Her lawyers says these newly disclosed Garda files show that Heapes and Jones were suspects in the Tom Nevin murder investigation and therefore had every reason to collude together and lie.
The 55-year-old is trying to overturn her 10-year-old conviction for killing her husband Tom at Jack White's Pub in Wicklow as a miscarriage of justice.
Following the decision, the Court of Criminal Appeal has put the case back until a later date.