Gardaí investigating the murder of Rachel O'Reilly in her Co Dublin home in October last year have confirmed they have complete records of the traffic on the mobile phone belonging to the main suspect in the killing.
Garda sources said yesterday a full file on the case is expected to go to the DPP within weeks.
The mobile phone records reveal the identity of everybody who rang the phone, the identity of those who were called from it, and the location of all the phones at the time of the calls.
The records allegedly do not support information already given to gardaí by the suspect, who claimed that the telephone was with him and therefore nowhere near her home in the Naul in north Co Dublin.
In fact, the phone traffic records appear to show that the telephone was used in, or very close to, her home within hours of her being murdered.
A postmortem revealed that the 30-year-old mother of two boys died after being struck with a blunt instrument.
Gardaí believe that she died sometime between 9.30am and 11.30am on October 4th, 2004. The Garda suspect that when she returned home after dropping her two sons to national school and to Montessori her killer was waiting for her.
"We believe that the killer was waiting for her to come home," said one of the senior gardaí investigating the murder.
He added that when she went into the house she was attacked. He also confirmed the telephone records revealed a conversation took place, which lasted nearly an hour, at around 6am on the morning of the killing. This was also made in the vicinity of the house.
The possibility that the suspect may have hired someone else to carry out the killing has not yet been dismissed.
But Garda sources confirmed they now believe they have a "very strong case of circumstantial evidence".
While a number of people were arrested as part of the murder investigation, no one has been charged to date. The full file will be sent to the Director of Public Prosecutions in the coming weeks.