Almost half of young people have been threatened online with more than half being the victim of false rumours.
Ding Murders: New CCTV images released.
Police looking for a Coventry businessman after a family of four were stabbed to death at their home have released new images of him.
The footage shows Coventry Businessman Anxiang Du, 52 abandoning a car he had used to drive to London from the Ding family's home in Northampton. Jeff Ding, his wife Helen and their daughters Xing, 18, and Alice, 12, are all thought to have been killed on the Royal Wedding Day, Friday 29 April 2011.
Anxiang Du, 52, hasn't been seen since. Police hope the new footage - shown on TV on the BBC Crimewatch programme on Thursday 22 September - will help jog peoples' memories and generate more leads.
Detective Superintendent Glyn Timmins, senior investigating officer in the case, said there had been three hundred possible sightings of Du. They are particularly interested in one in the British overseas territory of Gibraltar shortly after the murders.
Mr Timmins said: "I'd ask the public to contact us with information, however limited they feel it is, which can tell us where Anxiang Du is, where he has been or anything to do with the circumstances leading up to this terrible crime.
"It sometimes only takes a small piece of information to significantly move an investigation forward and I am very hopeful that Crimewatch can prompt someone who knows where Anxiang Du is to contact us."
Crimestoppers has previously offered a reward of £10,000 for anyone with information which leads to the arrest and conviction of the person responsible for the murders.
The siblings of a 26 year-old killed in a fight outside a pub in Birmingham have told Heart it's hit everyone who knew him.
Construction company Carillion have been named as one of the winners of £6.6 billion worth of contracts for the development of the controversial HS2 rail line.
A man who is terminally ill with motor neurone disease is to continue his "fight for choice at the end of life'' at the High Court.
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