A prosecutor said in his opening statement that Anxiang Du, 54, was "humiliated and angry," The Guardian reported. He allegedly killed Jifeng "Jeff" Ding, a university lecturer in Manchester, and his family the day after he was served with a notice that he had to pay thousands of pounds in court costs.
The bodies of Ding, his wife, Ge Chui "Helen" Ding, and their daughters Xing of Nancy, 18, and Alice, 12, were found in their home in Wooton outside Northampton in April 2011. Coincidentally, the family was killed the day Prince William and Kate Middleton were married.
Du was arrested more than a year later on a construction site in Morocco.
Du allegedly traveled from his home in Coventry to Wooton by train and bus. Once there, prosecutors said, he stabbed all four members of the family.
"His anger and desire for revenge was such that he killed not just the two people against whom he had a grievance, but decided to kill their children as well, to fully avenge himself of the wrong which he perceived they had done to him," the prosecutor, William Harbage, said.
Du allegedly fled in the Dings' car.
Du and Ding had gone into business together but then quarreled, resulting in a decade of litigation.