Ms Ilnicka’s ordeal, in which she claims to have been brutally attacked and sexually assaulted in a west of Ireland town, was highlighted by the Irish Examiner last year.
Following the report, a Garda investigation of the case was ordered by Justice Minister Frances Fitzgerald. That has been ongoing for the last 12 months and on Tuesday, the man against whom Ms Ilnicka made her allegations was interviewed by gardaí. He attended his local Garda station by appointment.
The investigation team is now compiling a file for the DPP which is expected to be completed in the near future.
Ms Ilnicka is a Polish national who was living in this country for less than a year when she claims she was assaulted in 2006 by the man, whom she had known for a short period.
When gardaí arrived at the house where the alleged attack occurred, she was in a severe state of distress and injury and was brought to a medical centre.
The man who was in the house with her at the time was not arrested, but was later charged with a relatively minor offence for which he received a suspended sentence.
Ms Ilnicka’s injuries were such that she had to be transferred first to Sligo Regional Hospital and subsequently to a hospital in Derry.
Hospital records show that she told staff she had been subjected to a sexual assault, but there is no record any examination for sexual assault was conducted.
She had a poor grasp of English at the time, but despite that there was no interpreter present when she subsequently gave a statement to the gardaí.
For a number of years after, she received counselling, but it was only when her story was published in January 2015, in the Irish Examiner, that the case was reopened.
Since then, the gardaí have been conducting an investigation into all elements of the case.
Other investigations were opened by the Garda Síochána Ombudsman Commission and the HSE.
The interview of the suspect on Tuesday is seen as signalling that the Garda investigation is now reaching a conclusion.