![Harry Potter World on Twitter: "Robert (Rob) Knox has been murdered for 12 years now. He was 19 years old and played the role of Marcus Belby in Harry Potter. #harrypotter #harrypotterathome # Harry Potter World on Twitter: "Robert (Rob) Knox has been murdered for 12 years now. He was 19 years old and played the role of Marcus Belby in Harry Potter. #harrypotter #harrypotterathome #](https://pbs.twimg.com/media/EYyhzs6XYAESsrx.jpg)
Harry Potter World on Twitter: "Robert (Rob) Knox has been murdered for 12 years now. He was 19 years old and played the role of Marcus Belby in Harry Potter. #harrypotter #harrypotterathome #
![Robert Knox: Brother of murdered Harry Potter star opens up about coping with his death | TV & Radio | Showbiz & TV | Express.co.uk Robert Knox: Brother of murdered Harry Potter star opens up about coping with his death | TV & Radio | Showbiz & TV | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/20/590x/Robert-Knox-s-brother-appeared-on-Lorraine-today-706121.jpg)
Robert Knox: Brother of murdered Harry Potter star opens up about coping with his death | TV & Radio | Showbiz & TV | Express.co.uk
![Harry Potter actor Rob Knox's mum finds happiness thanks to her son five years after his murder - Mirror Online Harry Potter actor Rob Knox's mum finds happiness thanks to her son five years after his murder - Mirror Online](https://i2-prod.mirror.co.uk/incoming/article2050571.ece/ALTERNATES/s615b/Sally-Knox-with-her-late-son-Rob.jpg)