On 25 August 1996, Caroline Glachan, a fourteen-year-old Scottish girl, was found murdered in the River Leven in West Dunbartonshire, Scotland. The case was unsolved for 27 years until the conviction of three people in 2023. From Wikipedia
Donna Marie Brand, the last of three perpetrators, has been sentenced to life imprisonment for her role in the 1996 murder of 14-year-old Caroline Glachan.