7 August 2011 Last updated at 07:24 ET
Ding murders: Plea to trace fugitive suspect Anxiang Du
Anxiang Du was filmed on CCTV at Birmingham New Street Station on 29 April
Detectives have made a fresh appeal for information to trace a man from Coventry they suspect of killing four members of a family from Northampton.
Jifeng Ding, his wife Helen and their two daughters, Alice, 12, and Xing, 18, were found stabbed to death at their home in Wootton on 1 May.
The Dings' business partner Anxiang Du is the prime suspect for the deaths but has not been seen since May.
He co-ran a Chinese herbal medicine store in Birmingham with the family.
The suspect felt he was owed tens of thousands of pounds by Mrs Ding and went missing the day after losing a court case for control of the business, Northamptonshire Police said.
A ￡10,000 reward has been offered by Crimestoppers to anyone with information that leads to the arrest and conviction of the person responsible for murdering the family.
http://www.bbc.co.uk/news/uk-england-14435750