The mother of murdered backpacker Kirsty Jones has urged the British government to do more to help families whose relatives are killed abroad.
The BBC reported this week that Sue Jones is upset that she's had no response to a Freedom of Information request to have the investigation files into her daughter's slaying in Thailand released.
The Foreign and Commonwealth Office (FCO) has said that it would meet any family concerned about a death overseas, but cannot interfere in criminal investigations that take place in other countries.
Kirsty Jones, 23, a university student from Tredomen in Wales, was raped and strangled at a guesthouse in Chiang Mai in 2000.
Earlier this year, police in Wales received permission to forensically review evidence collected by Thai officers. Investigators at the time said they were hopeful that DNA advances and fresh interviews with witnesses could provide a breakthrough.
Sue Jones said she supported a protest by about 20 families, in a similar situation to her, outside the Foreign and Commonwealth Office in London on Wednesday.
"As far as I'm concerned communication is [the Foreign Office's] biggest problem," she told the BBC.
She said she had been trying to persuade the Foreign Office to release documents relating to her daughter's murder for six months, but UK government officials had claimed the information could harm diplomatic relations or prejudice a future court case.
"They can only do as much as they're allowed to do but claiming that these documents could damage diplomatic relations is ridiculous," she said.
Mrs Jones has worked for years to try to bring her daughter's murderer to justice, even travelling to Thailand with Welsh police last year to publicise a 10,000-pound reward for information.
But, despite numerous appeals, her daughter's killer has never been found.
Kirsty Jones's body was found on Aug 10, 2000 in her guesthouse room more than 12 hours after her death.
A month later, police arrested guesthouse owner Andrew Gill, 36, but Chiang Mai prosecutors decided not to proceed with the case, citing weak evidence.
The case was transferred to the Thai DSI at the request of the Jones family, the British embassy and British police, in August 2005. It has since been reopened several times.
Police now have a DNA profile of the suspect or somebody who aided in the crime, and indications are that it was a person of Southeast Asian origin, the BBC reported earlier this year.
The statute of limitations in the case is 20 years.
The FCO said in a statement that 6,000 British nationals die overseas each year, and that it offers to provide consular support to every family involved.
"However, investigation of the death of any British national is a matter for the judicial process of the country they died in, and we must respect their systems just as we expect them to respect the UK's laws and legal processes."