Two years ago, transgender teenager Brianna Ghey was stabbed to death by two 15 years of age. The killers were that were being trapped on the dark web, as the victim was trapped in an online world of itself. Now his mother became friends with the parents of one of the killers. On the second anniversary of Brianna’s death, Esther sat with Simon Hattenstone to discuss the killing of her daughter and her own extraordinary response.