A devastating documentary about the teenager’s life, murder and legacy. Plus: the people trying to flee Putin’s kill list. Here’s what to watch this evening

9pm, ITV1
The last text Esther Ghey sent to her daughter, Brianna, said “how good it was” that she was going out and re-entering society. Esther doesn’t know if she ever saw that message – Brianna was murdered in 2023 by two 15-year-olds, one who she believed was her friend, in a brutal attack partly motivated by her transgender identity. This devastating and brave documentary tells Brianna’s story, from the sparkling, beloved girl she was to how the disturbing online world affected her wellbeing. It also examines the legacy she has left, as her mother continues to campaign for social media reform. Her friends help paint a picture of her, while journalists and police give insights into a case that shocked and saddened the nation. Hollie Richardson