Graham Dwyer's trial for the murder of Elaine O'Hara has begun hearing evidence of mobile phone traffic.
Earlier the trial heard paint spots found on a spade near Elaine O'Hara's remains did not match paint samples taken from his home in Foxrock.
Our Courts Correspondent Francesca Comyn reports:
The jury heard gardai contacted service providers like 02 and 3 Ireland requesting records of phone calls to and from five mobile phones as part of their investigation into Elaine O'Hara's death.
Telecoms engineer Conor O'Callaghan gave evidence about telephone cells or masts of interest which generate coverage for phone calls in the Dublin and Wicklow area, including one near Killikee – the area where the childcare workers remains were found in September 2013.
He said one of the mobile phones gardai requested details for was an 083 number for a subscriber listed simply as 'Mr Prepaid customer.'
Earlier the trial heard paint spots found on a spade near Elaine O'Hara's remains did not match paint samples taken from his home in Foxrock.
Yesterday, the architect's wife Gemma Dwyer identified the spade as being the same as one missing from their garden.
In her evidence yesterday Gemma Dwyer was shown a photograph of a spade found near Elaine O'Hara's skeletal remains at Killakee in the Dublin mountains.
She said she recognised the spade as one missing from their home partly because there were splashes of paint on it from the painting of a garden fence.
Today Bridget Fleming from the Forensic Science Laboratory gave evidence that she analsyed the spots of brown paint on the spade with paint samples and a piece of the timber fence at the Dwyer's address in Kerrymount Close.
She said while they were similar in colour she observed differences in their chemical composition and concluded they did not match.
Earlier, the Criminal Court heard a DNA profile matching Graham Dwyer was found in stains on Elaine O'Hara's mattress.
Dr David Casey from the Forensic Science Laboratory carried out DNA analysis on items from Elaine O'Hara's apartment including a rope, a rug, a gas mask and a black dress.
The results he said were mostly inconclusive except for on a mattress where he found 5 areas of semen.
The jury heard DNA profiles matching the accused Graham Dwyer were found on three of those areas
He said the estimated chances of finding a match in someone else was less than one in 1000 million but it was not possible to say when the semen was deposited.
He agreed with the prosecution there were blood stains matched to Elaine and five stabs or cut marks and 3 small holes mainly at the top of mattress.
He also examined items found near Elaine O'Hara's remains including tracksuit bottoms and a spade but they did not yield sufficient biological material for DNA analysis.
He said vehicles seized from Graham Dwyer's Foxrock home were extensively searched for blood using a chemical spray that detects trace elements but no blood was found.
Graham Dwyer is alleged to have stabbed Elaine O'Hara to death for his own sexual gratification.
He denies murder.
