Northern Ireland's senior coroner has told a preliminary hearing in Belfast that the inquest into the death of Arlene Arkinson may not start for two years.
The 15-year-old, from Castlederg, went missing after a disco in Buncrana in 1994.
Her body has never been found.
The examination of her death had been due to begin in the autumn but today's hearing was told that a huge amount of outstanding paperwork still has to be re-examined by police officers.
A lawyer for the police said they must go through all papers to assess their relevance before passing them to legal representatives of both Robert Howard - the child killer who was acquitted of Arlene's murder in 2005 - and the Arkinson family for examination