It is a haunting image of stolen innocence: a 10-year-old Vietnamese schoolgirl smiles happily on her first ever seaside holiday, unaware she is in the clutches of a paedophile.
The picture was taken just hours after Tran Thi Thu Diem arrived in the southern Vietnamese resort of Vung Tau with her 24-year-old aunt at the end of an eight-hour bus journey from her home near the Cambodian border.
Diem leapt at the chance to spend the Tet new year holiday with her aunt at the home of her wealthy western boyfriend and begged her reluctant mother until she agreed to let her go. Back then, the boyfriend's name - Paul Francis Gadd or Gary Glitter - meant nothing to her.
'He seemed like a kindly uncle at first,' Diem says, shyly, recalling how he bought her sweets and soft drinks and a pink top as she skipped cheerfully along the seafront with Glitter and her aunt. Soon after, Glitter brought Diem and her aunt, Tran Thi Kim Oanh, back to his rented seaside villa. On the second night, he took them both to his bed, forcing the 10-year-old to lie beside him and watch as he had sex with Oanh. The pattern was repeated every night afterwards. Glitter and Oanh made Diem swear to say nothing to her parents about what happened.
That summer, at Glitter's request, Oanh returned three more times to Vung Tau with Diem. On those visits, the aunt took money from Glitter and allowed him to molest the little girl while she watched. Oanh was paid US$50 the first time, US$100 the second time and US$200 the third time as the abuse worsened with each attack.
Terrified and confused, Diem never breathed a word to her parents about what had happened. It was only four months later when police knocked on the door of the family's home in Long Xuyen that they realised the aunt's boyfriend had been subjecting their daughter to horrific abuse.
Jailed in Britain for downloading child pornography in 1999 and ejected from Cambodia three years later for suspected child abuse, Glitter had been living secretly in Vung Tau for more than a year, protected by a close circle of western friends. It was outside his villa, knowing nothing about Diem or his other victims, that I confronted him on a Saturday afternoon in November 2005.