Joyce Campbell died when she was involved in a tragic car crash in 2005.
An inquest into Ms Campbell’s death was due to take place at Letterkenny Coroner’s Court today.
However coroner John Cannon was forced to adjourn the inquest.
Mr Cannon told the court that there have difficulties with securing information from Ethiopian police.
“They do not seem to be getting great hope from the police in Ethiopia,” he said.
The Campbell family said at a previous adjourned inquest that they were unhappy at the level of details being released surrounding Joyce’s death.
Coroner Cannon revealed that Gardai have now been in touch with police at Interpol who have taken over the case.
Ms Campbell, from Meenmore, Dungloe, had just celebrated her 25th birthday when she died while working for the Vincentian May Missioners.
She was only in Ethiopia for three weeks as part of a four month stay when the tragedy happened.
Two other Irishmen in the car were also injured in the crash in Welyta, about nine hours north of the Ethiopian capital Addis Ababa on August 8th.
Joyce was a graduate of Development, Health and Disaster Management and she also had a Masters in Humanitarian Assistance.
She was a relation of MEP Pat The Cope Gallagher.
Coroner John Cannon adjourned the inquest until September 28th.