Graham Dwyer is to learn the result of his appeal against his conviction for the murder of Elaine O'Hara in 2012.
Dwyer - a Cork native - claims he was denied a fair trial.
He was jailed for life in April 2015, after being found guilty of killing the childcare worker.
The 36 year-old's remains were found in Killakee woods.
When the architect's appeal was heard a few weeks before Christmas last year, 7 years had passed since a jury convicted him of murder.
The reason it took so long, was due to Dwyer's lawyers deciding to first challenge the law - that allowed for the retention of his mobile phone metadata - and the subsequent accessing of it by gardaí investigating Ms. O’Hara’s murder.
He won the challenge, with the admissibility of the evidence at trial featured heavily in his appeal.
The former Foxrock resident claimed prejudice was allowed to creep in to the trial.
He accused the judge of making a mistake, by not taking the case out of the jury’s hands due to what they claimed was a lack of evidence.
Next Monday, March 27th, marks the eighth anniversary of Graham Dwyer’s conviction.