The prosecution in the Graham Dwyer murder trial has been summing up its case against the architect.
The father of three from Kerrymount Close, Foxrock is alleged to have lured Elaine O'Hara to the Dublin mountains and stabbed her to death to satisfy a deep-seated sexual desire.
Prosecution barrister Sean Guerin has described Elaine O'Hara as a troubled and lonely person caught in an abusive and manipulative sexual relationship with Graham Dwyer.
The architect is alleged to have lured her to Killakee Mountain on the evening of August 22, 2012 and then stabbed her for his sexual gratification.
He denies murder.
In his final address to the jury, Mr Guerin said this is a case about a person making real their "disgusting fantasies of torturing and killing women".
The prosecution claims the pair used untraceable phones including the so-called "master and slave" phones to communicate.
Mr Guerin put it to the jury that while Graham Dwyer denies having anything to do with these phones, text messages between them tell the story of his life from car repair bills to the birth of his child.