Police hunting a man suspected of murdering a family from Northampton have increased the reward for information to £25,000.
An IPCC report into the way Northamptonshire Police handled the case of the Ding family murders finds they went to the wrong address.
The Ding family were killed in Northamptonshire last April. An emergency call was made from their house but police were unable to trace it.
The jury in the trial of Anxiang Du, who is accused of murdering a family of four at their home in Northampton, will consider its verdict today.
Du, who's 54, has admitted stabbing university lecturer Jeff Ding, his wife Helen and their two daughters after a business dispute.
He denies their murder claiming it was manslaughter due to loss of control or diminished responsibility.
A man is due to stand trial today accused of murdering four members of the same family at their home in Northampton.
Anxiang Du, 54 and from Coventry, has previously pleaded not guilty to the murders of Jeff Ding, his wife Helen and their two daughters two-and-a-half-years-ago.
A man's due to appear in court charged with killing four members of the same family.
Anxiang Du was arrested in Morocco for the death of a Northampton businessman and his family in 2011.
Jifeng Ding's wife Helen and two daughters, Alice and Xing were all found stabbed to death at their home.
Du is due to appear at Northampton Crown Court.