A Dorset detective will appeal for information on Crimewatch tonight in the hope of solving the brutal murder of Bournemouth mother-of-two Heather Barnett.
DS Mark Cooper, who is leading the hunt for Heather's killer, will appear on national television with Dr Stuart Black, an expert in environmental radioactivity at Reading University.
Five years after the popular seamstress's murder, Dr Black found new forensic evidence on human hair recovered from Heather's right hand following her death.
The 48-year-old's mutilated body was discovered by her two children in the bathroom of their ground floor flat in Capstone Road, Charminster, just after 4pm on November 12, 2002.
Known to her friends as "Bunny", Heather had been hit over the head with a hammer-like object and stabbed several times.
In a shocking twist, her breasts had been cut off and placed next to her body with strands of cut hair, which did not belong to Heather, placed in her right hand.
DS Cooper will appeal for help to identify and trace the hair's owner.
An appeal in Dorset last month prompted 35 calls.
Scientific analysis of the 9cm long strands of hair, representing nine months' growth, discovered traces of the United Kingdom, southern USA, eastern Spain and southern France.
The person involved had lived in the United Kingdom before travelling abroad and had changed their diet twice in the three months before the hair was cut.
He or she visited the Valencia to Almeria area of eastern Spain and or the Marseille to Perpignan area of southern France for up to six days some 11 weeks before the hair was cut.
The hair's owner then visited the urban area of Tampa in Florida, Southern USA, for eight days some two to two and a half weeks before it was cut.
DS Cooper will appeal to anyone who undertook or recognises these patterns of travel before November 12 to get in touch.
Heather's murder has been linked to the disappearance of 16-year-old Elisa Claps in Potensa, southern Italy, in September 1993.
Her body has never been found.
Dorset detectives are currently liaising with their Italian counterparts and Interpol.
l Call investigators on 01202 222500 or use the free, anonymous Crimestoppers line on 0800 555111.
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