The judge in the Graham Dwyer murder trial will begin his final directions to the jury at the Central Criminal Court this morning.
Mr Dwyer, from Kerrymount Close in Foxrock in Dublin denies killing Elaine O'Hara at Killakee in August 2012.
The prosecution alleges he stabbed the childcare worker to death to fulfil a deep rooted sexual desire, but his defence team argues the forensic evidence doesn't fit the case being made against their client.