WARNING: This report contains graphic and explicit details of a violent and sexual nature.
There are three things that are notably constant at the trial of architect Graham Dwyer.
The first is the presence of an ever-growing mass of onlookers, including retirees, domestic day-trippers, foreign tourists, well-heeled ladies with designer handbags and children - because that is what transition year students are - who feverishly queue for up to an hour each day to get into courtroom 13 at the Criminal Courts of Justice.
The second is the presence of Elaine O'Hara's family, who sit close-knit, supported by their garda liaison officer.
The third is the presence of Graham Dwyer's father Sean Dwyer, a courteous man who holds doors open and offers his place in the CCJ's canteen line to those who need to have their lunch on the go.
When they returned to the jury box after a brief recess for legal matters that they have become accustomed to, the jurors returned to a courtroom that had been cleared by trial Judge Mr Justice Tony Hunt.
Under a rarely invoked law dating from 1951, judges can exclude members of the public from court if they are of the opinion that the offence involves material that is indecent or obscene.
When the jury returned, the crowds were gone: so too was Sean Dwyer.
Judge Hunt warned the jury of seven men and five women that what they were about to hear would be difficult, adding that they might have noticed that the audience was smaller than before the break.
It is the State's case that Mr Dwyer stabbed Elaine O'Hara to death for his own sexual gratification. It is a charge that Graham Dwyer, a married father of two small children - who also has an adult son - denies.
Yesterday prosecutor Sean Guerin SC asked Detective Garda Brid Wallace of the Computer Crime Unit about a document found on an electronic storage device at Graham Dwyer's home.
Det Wallace confirmed that the document was created at 11.56am on March 2nd, 2011. It was last modified at 13.27 the same day and the total editing time was 89 minutes. The four-page document, Det Wallace agreed, was called 'Killing Darci' and the accused placed his head in his hands as Mr Guerin read it into the court record in a soft but strong monotone.
The first person account began with a statement from the author that from the first email, he knew "this one was special", the author stating that he had fantasies about killing since he was a teen.
The rationale for excluding members of the public from the courtroom soon became apparent.
"I got hard every time I had a knife in my hand, wielding the power knowing that I could decide who lived and died, just like my hero. God," said the writer, who went on to recount how his addiction grew, leading him to meet "subs" who needed pain as much as he needed to give it.
The author said that bondage, rape, slashing and stabbing soon became his hobby. He said he had two fine subs and knew he was lucky as there were 100 men like him for every sub like these, adding that he always "won them over". He said that one of the subs came to him, asking him for the ultimate, to help her die. This, he said, was at the time he was considering "crossing the line".
He thought about stabbing a stranger for a while to satisfy his lust, a feat he described as exchanging a life for an orgasm.
"Having been responsible for creating three lives, wasn't I entitled to take just one?" he asked, musing on the prospect of finding someone who had the courage to die in a small country were there were 400 to 500 suicides a year.
The author then talked about meeting a girl called Cassie which, the trial heard, was an online name used by a young American woman called Darci Day who testified on Tuesday about her contact with Mr Dwyer.
The author stated that Cassie wanted to die in the same way that he wanted to kill, "a rare marriage indeed" said the author before describing Cassie's journey from America to Dublin to the place he had prepared to rape, mutilate and kill Cassie.
Aspects of the details of Cassie's final journey as relayed in the document are too graphic and disturbing to repeat. On any objective analysis, the contents of 'Killing Darci' more than meet the 1951 threshold for obscenity, detailing how Cassie posted a suicide video, before the author undressed, being careful to shield the shovel, bleach and lime from Cassie's view.
The document detailed how the "pretty angel" was tied roughly to a mattress as a camera rolled to catch him stabbing her in the stomach, a "beautiful, perfect oval" wound he would later ejaculate into as she drew her final breath and blood gurgled from her body.
"I stabbed her again harder and again and again, she gasps each time almost in relief as the knife went in and out of her perfect body and her life blood flowed down her sides," said the author who - in the document - proceeds to violate Cassie's body post mortem.
"As the twitching stopped and she breathed her last I came deep within her womb, my seed seeking eggs that will never hatch," said the author as tears fell from the face of Ann Charles, Elaine O'Hara's sister.
The document, pocked by spelling mistakes, concluded with remarks about the now dead Cassie "all sexy and stabbed, her throat slit, life gone", how he had lovingly and carefully washed her body.
It detailed how the author had wrapped Cassie's body in a mattress, covering it with bleach and lime. The author said that he tied Cassie's body on to the mattress and covered the whole thing in plastic and carried it to the car.
"I drove a short distance to where I had prepared her grave where I would visit and ask for forgiveness for what I had done," he concluded.
"That's file exhibit 303," said Mr Guerin as he finished the reading.
The trial continues.
The following are extracts from a four-page document entitled 'Killing Darci' which, the Central Criminal Court has heard, was seized from an electronic storage device found at Graham Dwyer's home.
Members of the public were excluded from the Central Criminal Court by trial judge Mr Justice Tony Hunt as the document - a first-person account - was read by prosecutor Sean Guerin SC.
The Irish Independent has edited extracts of the document as they are too graphic to report. In the document, the author describes raping and mutilating a woman called 'Cassie':
* "Months had gone by and soon the day would finally arrive. From the first email, I knew that this one was special."
* "I had always fantasised about killing ever since I was a teenager. I got hard every time I had a knife in my hand, wielding the power knowing that I could decide who lived and died, just like my hero. God."
* "I was the lucky one, I knew there were 100 men like me for every one of the girls I played with and I always managed to win them over, partly because I knew what I was doing and partly because I could show others what I was capable of."
* "Around the time I considered crossing the line, one of my subs came to me and asked for the ultimate, to help her to die.
"This was discussed and planned at length. Ultimately, the decision would be hers unless I took the power away from her."
* "Having been responsible for creating three lives, wasn't I entitled to take just one? But who?"
* "The sun was setting as we arrived at the cabin, she knew she wouldn't see another sunset."
* "We did not say much, we had nothing to say."
* "She did not need to see the shovel, bottle of bleach and bags of lime."
* "We prepared everything in the greatest detail, like watching a movie we had written and directed."
* "He (a reference to God as it was deliberately marked with a capital He) did nothing to stop events here and who wouldn't have wanted such a pretty angel by his side?"
* "She couldn't hear what I was doing. I could hear her fear. I grabbed her arm roughly, she didn't resist. I tied her roughly on a mattress on the ground, which was lying on plastic. She knew this mattress would be her coffin."
* "It was dawn when I woke up and she was stiff and pale. Her back was pale. All the blood was crispy and matted everywhere."