I cry every day, says father of murdered Harry Potter actor

The father of murdered Harry Potter actor Rob Knox has spoken of the raw emotions he still feels about the death of his son as like "being sent to hell".

Colin Knox said he cried every day over the death of 18-year-old Rob, who was knifed five times by Karl Bishop, 22, outside a bar in Sidcup in May last year after he had finished filming on Harry Potter And The Half-Blood Prince. Bishop was jailed for life with a minimum term of 20 years in March.

Mr Knox, 55, said: "The crying process goes on day to day. Life doesn't really get easier. If you lose someone you love, especially a child, it is the darkest place to be. It feels like you have been sent to hell. I still can't believe he is not here."

Mr Knox and Rob's mother Sally were donating £1,000 from Rob's memorial fund to a charity that supports victims, witnesses and their families who are going through the "daunting" court process.

The couple returned to the Old Bailey yesterday to thank staff from Witness Service, which last year helped 47,000 witnesses in London and is calling for more volunteers. Mr Knox said: "They are the unsung angels. Some people may not realise it, but most of them give up their own time."