The trial of Graham Dwyer for the murder of Elaine O'Hara in 2012 has been told gardaí found two knives in the basement of Mr Dwyer's workplace after being directed there by Mr Dwyer and his solicitor.

Mr Dwyer, a 42-year-old father of three, denies murdering 36-year-old Ms O'Hara at Killakee Mountain in Rathfarnham on 22 August 2012.

Detective Sergeant Peter Woods told the court that he got a phone call and then a fax message from Mr Dwyer's solicitors, Jonathan Dunphy, on 17 February 2014.

He said the message included a hand-drawn map of the basement of architect's firm A & D Wejchert, where Mr Dwyer had worked.

He agreed that this was information provided voluntarily by Mr Dwyer and his solicitor.

The document was headed "Items of Interest" at A&D Wejchert.

It showed a map of the basement and a particular area in the basement where old files were stored and directed gardaí to a particular filing box.  

Sgt Woods said they found two knives in the box, one large Buck Special Hunting knife and a smaller flick knife.    

The knives were shown to the jury.

Sgt Woods said the larger knife was found in a leather scabbard.

He said the scabbard, or holder, had some marks on it but the knife was in very good condition.

Under cross examination from Mr Dwyer's barrister, Remy Farrell, Sgt Woods agreed that Mr Dwyer had been charged on 18 October 2013 and the book of evidence was given to him in January 2014.

He agreed that at that stage it became more apparent what the garda view of the case was.  

He agreed that the gardaí had attached considerable significance to the fact that documents showed a Buck Special hunting knife had been ordered from Hunting Ireland.

Sgt Woods said the fact that the knife had been delivered on 21 August 2012 was "hugely significant" to gardaí as well as the fact that there was no sign of the knife.

Michael Fenlon, who runs an outdoor sports shop and website activehuntingireland.ie, gave evidence of an order placed with the website on 17 August 2012. 

The invoice was made out to Graham Dwyer of 6 Kerrymount Close in Foxrock. 

It was an order for a Buck Special 119 knife for €95, to be delivered to Mr Dwyer at A&D Wejchert on Lower Baggot Street in Dublin 2.  

There was a note on the invoice asking for the package to be marked "private and confidential", "regards Graham".   

Another document from a courier company showed the knife was delivered on the morning of 21 August 2012.

Ms O'Hara went missing on 22 August 2012. Her remains were found on Kilakee Mountain on 13 September 2013.

The prosecution alleges she was stabbed to death by Mr Dwyer. 

He denies the murder.

Earlier, Garda Chris Boylan gave evidence of finding a shovel in a wooded area near where the remains of Ms O'Hara were found in September 2013.

The court is also heard evidence from Joe Mason, a representative of the management company responsible for Belarmine Plaza, the apartment complex in Stepaside, where Elaine O'Hara lived.

Mr Mason said the company's records showed there were no issues with the CCTV system at the complex between its installation in January 2012 and August 2012.

Siobhan McEvitt, the office manager at A & D Wejchert architects, gave evidence about documents she had handed over to gardaí.

These included mobile phone records, a certificate of membership of the Irish-Polish business association for Mr Dwyer, emails in relation to his salary, breakdowns of company credit cards, grant claim forms, timesheets, mileage spreadsheets, and attendance records.  

Ms McEvitt said they would not record all times of people going out of the office - that would be too complicated she said.    

There were letters addressed to Mr Dwyer as well as emails sent by him on 22 and 23 August 2012.

She also handed over minutes of meetings relating to various projects.  

There were also documents from late May 2011 relating to a Bike to Work scheme and Mr Dwyer's purchase of a bicycle.

The trial has now heard from almost 90 witnesses and has seen around 180 exhibits.  

It will continue on Monday morning.