A teenager reveals her ordeal with Alexander McCartney, a notorious online sex offender who exploited her image to target other girls. Victims, including Emily, now 18, shared their stories in a BBC documentary after McCartney’s conviction for a range of crimes, including manslaughter. He posed as a teenage girl to lure young users, leading to over 3,500 identified victims worldwide. Detectives stress the importance of reporting online abuse, urging others to come forward, as many still suffer in silence. The documentary highlights the severe consequences of McCartney’s actions, emphasizing the need for awareness and support for victims.