Jifeng ‘Jeff’ Ding, his wife Ge ‘Helen’ Chui and their two daughters Xing ‘Nancy’ Ding and Alice Ding were brutally murdered in the home on Friday 29 April 2011.
The suspected murderer Anxiang Du, 53 from Coventry was declared the only suspect soon after the discovery of the murders and has since evaded capture.
As part of an anniversary press conference Assistant Chief Constable Martin Jelley appealed again to the wider community to come forward if they had any information that could assist the investigation.
An increased reward of up to £25,000 for any information leading to the arrest and successful conviction of the suspect was also revealed to mark the anniversary.
Initial enquiries into the murder focused on key areas including Northampton – where the murders were committed, the West Midlands – where the suspect was from and London – where it is believed he travelled to and abandoned the car.
The investigation further focused on the UK as both the victims and the suspect were UK citizens with friends and family in the country.
Later stages of the investigation have focused in Europe and most recently China.
On Sunday 25 March, three officers travelled to China with the aim of speaking with associates of the suspect for any information they may have in identifying people who could have assisted him in his escape.
The trip to China also afforded the force the opportunity to meet the family of the victims, update them on the investigation and pass on the force’s deepest sympathies for their loss, in person.
DCI Tom Davies, said: “We have a strong team of officers working on the case, sifting through every piece of information or line of enquiry to ensure that we can track him down. Our recent trip to China and arrests show that we are very much active in this case and in our search for Anxiang Du.
“We are working closely with a number of law enforcement agencies including Interpol and the Serious and Organised Crime Agency. In addition, we are working with the National Missing Persons Bureau to ensure where unidentified bodies are recovered, it is not our suspect. This supports our belief that he is alive.
“We have a substantial reward of up to £25,000 available for anyone who has any information that leads to the successful arrest and conviction of Anxiang Du. And would ask members of the public to contact Crimestoppers anonymously on 0800 555 111 or the police on 101 if they have any information, so that we can bring justice to the families of the victims.”
