The family of Kirsty Maxwell, who died at a holiday apartment block in Benidorm during a hen party, have claimed Spanish police destroyed the clothes she was wearing at the time.
The 27-year-old from West Lothian fell from an apartment block in the holiday resort on 29 April last year.
Four British men who were in the hotel room at the time of the incident were questioned by detectives.
A fifth British man was arrested and released.
All the men questioned were allowed to return to the UK.
Her family said during a press conference in Edinburgh that Ms Maxwell’s clothing was not tested for DNA.
They previously said they believed something “sinister” had happened to her.