A �4,000 reward is being offered for vital information leading to the arrest and conviction of the person responsible for the murder of Norwich prostitute Natalie Pearman.

The body of 16-year-old Natalie, pictured, was discovered at Ringland Hills, on the outskirts of Norwich, at 3.50am on November 20, 1992 just hours after she had last been seen in Rouen Road, part of the city's red light district.

The Evening News ran an appeal last month to mark the 19th anniversary of her death in a bid to help detectives investigating the case.

It prompted an 'interesting' call to police from a member of the public who said they saw Natalie get into a car in King Street. The reward, being offered by the independent Crimestoppers charity, is aimed at prompting that caller – and others with crucial information about the case – to get in touch.

Ann Scott, eastern regional manager for Crimestoppers' said: 'This murder has robbed a family of their young daughter and they are still searching for answers 19 years on. Please come forward to the independent charity Crimestoppers so this awful crime can be solved. We never ask for your name, no call is recorded and we do not trace IP addresses or calls. You won't have to speak with police, give a statement or to go to court – we only want to know what you know, not who you are.'

Det Chief Insp Jes Fry, who is leading on this investigation, said: 'We urge this particular caller to ring back – we will treat their information confidentially and they do not have to give their personal details if they do not wish. Their information could be vital to solving this crime. Alternatively they can contact the independent charity Crimestoppers anonymously.'

The reward of up to �4,000 can only be claimed by calling Crimestoppers anonymously on 0800 555111 and asking for a reference number. Only information given to Crimestoppers is eligible for a reward. Alternatively people can telephone police on 101