[2] Having studied at Beths Grammar School, Bexley, Knox began acting aged 11, gaining small roles in British television shows like The Bill, After You've Gone and Trust Me, I'm a Teenager.

His murder attracted widespread attention in the British press, and his assailant, Karl Norman Bishop, was subsequently sentenced to life imprisonment, with a minimum 20-year non-parole period.

He had been acting since the age of 11, and his first credited role was a small part in an episode of the ITV police drama The Bill and he also appeared in the Channel 4 reality show Trust Me, I'm a Teenager, and the BBC comedy After You've Gone.

[1] Although his character does not appear in the seventh novel, Knox had signed on to reprise his role as Marcus Belby in the production of Harry Potter and the Deathly Hallows.

[10] Bishop was found guilty of murder on 4 March 2009,[11][12] and received a life sentence with a minimum of 20 years before being considered for parole.