Some people at the scene thought that Knox's mother was allowed to hold her son in her arms as he lay dying on the pavement. 'He was respectful to others and adored by all his family and friends. 'The life and soul of the party, he was very outgoing, loved sports, and would always strike up a conversation with people. 'Rob was kind and thoughtful and would always help out others - he would always spend his last penny on other people instead of himself,' said his parents in a statement. Murdered teenager Robert Knox (right) with his mother Sally and younger brother Jamie, 16. The stabbing happened just yards from the shoe shop owned by Jimmy's parents, Sally and Colin Knox, in Sidcup High Street. I grabbed the knife - I didn't know at the time that he had another knife. 'Rob was just trying to help out,' said his friend, Tom Hopkins, 18. They apparently pinned down the knife-wielding man when Knox was fatally stabbed in the head. Knox and a friend intervened on behalf of his younger brother, Jamie Knox, 16, who became involved. That man was armed with two wooden knives, one of which he was brandishing. Apparently, the scuffle began when two men entered the bar, one of whom claimed that someone had stolen his cell phone. The young actor, Knox, who often was an extra in films, was caught in a fight outside the Metro Bar in Sidcup, next to the Sidcup train station. Harry Potter and the Half-Blood Prince will be released this November. Unfortunately for Marcus, his father was not on good terms with the famous potioneer, and for this reason Horace Slughorn, who set up the 'Slug Club', ultimately passed Marcus over. In this film, Knox's Hogwarts character, Marcus, was initially considered for membership in the 'Slug Club' because his uncle, Damocles, invented Wolfsbane Potion. The actor, Rob Knox, 18, plays Marcus Belby, a member of Ravenclaw House in the sixth Harry Potter film, Harry Potter and the Half-Blood Prince. He apparently died protecting his younger brother. Tragically, it turns out that one of the teenaged actors who is a character in the sixth Harry Potter film was stabbed to death this morning in front of a bar in Sidcup, Kent, located in the south of London. This story should be placed into the 'what the hell is wrong with people' category, but alas, it doesn't exist. The teenager died around 1am in an attack outside the Metro Bar, four other men were also hurt in the fight. People lay flowers at the scene in Sidcup, Kent, where 18-year-old Rob Knox was stabbed to death in a fight early today.

Who invented wolfsbane potion