Detectives investigating the death of heroin addict Rachel Whitear have travelled to Greece to interview the last known person to have seen her alive.
Images of the student's death were used in an anti-drugs campaign
The 21-year-old student, originally from Ledbury, Herefordshire, was found in a bedsit in Exmouth, Devon in May 2000.
It was originally thought Ms Whitear died from a heroin overdose but tests revealed there was not enough of the drug in her blood to have killed her.
Two officers from Wiltshire Police, who have taken over the inquiry into the student's death, flew to Greece to question the student's counsellor.
A statement released by Wiltshire Police said: "As part of the investigation into the circumstances surrounding the death of Rachel Whitear, two Wiltshire police officers recently visited Greece and spoke to a witness.
"This witness was one of the last people to see Rachel and was able to provide police with information concerning Rachel's lifestyle and the events immediately prior to her death."
Two men from the Midlands were arrested in connection with Ms Whitear's death last year.
The Police Complaints Authority (PCA) confirmed in October that neither would face any charges.
Graphic images of the 21-year-old'd dead body were released by her parents in a campaign warning of the dangers of drug abuse.
Pauline and Mick Holcroft, from Withington in Herefordshire later criticised Devon and Cornwall Police over their investigation of their daughter's death.
Wiltshire Police took over the inquiry after it was voluntarily referred to the PCA.