Graham Dwyer's murder trial has been hearing the graphic contents of a document called 'Killing Darci' which was allegedly found on a hard drive at his home.
Sean Guerin SC, prosecuting, read the file in court which describes a man filming the killing of a woman called Cassie from Maine, USA, with a knife, in a cabin in Ireland.
He then rapes her corpse and dumps the body.
KILLING FANTASY
'I always fantasised about killing from the age of 16, knowing I had power to decide who lived and died like my hero God,' read Mr Guerin.
In the document this is spoken of as an 'addiction' that grew. The man says he 'thought about taking the life of a stranger' and how this would be a videp clip he would watch 'into old age again and again'.
DG Brid Wallace gave evidence that the 4 page document was found in a folder called 'sub' on a Seagate hard drive at his home in October 2013.
The jury heard the author of the file was created and last modified on 2 March 2011 and its author was ADWejchert.
Graham Dwyer put his head in his hands as the document was read out to the Central Criminal Court.
'DIFFICULT' EVIDENCE
Mr Justice Tony Hunt warned the jury beforehand that the evidence would be difficult.
DG Wallace agreed with Mr Guerin, prosecuting, that the hard drive also contained a photo of a dead blonde woman and an animated video of a female throat being cut.
Graham Dwyer from Kerrymount Close, Foxrock denies stabbing childcare worker Elaine O'Hara at Killakee mountain in Dublin in August 2012.
'GO DOWN TO SHORE AND WAIT'
Earlier the jury heard the last text sent from a phone allegedly used by Graham Dwyer was 'go down to shore and wait'.
There was evidence it was sent around 6pm in the Shankill area on August 22nd 2012 the day of the alleged murder.
Elaine O'Hara was seen by a jogger near Shanganagh cemetary at around 5.45pm that evening.
Her skeletal remains were found at Killakee in September 2013.
