Anxiang Du is standing trial accused of killing the Ding family in Northamptonshire.
William Harbage told jurors there was no argument that Du was responsible for the killings but he would claim he had not intended them to happen.
There is no dispute in this case that Du is the man responsible for these four tragic deaths.
There is no dispute that he unlawfully killed all four members of the Ding family.
Indeed, it was obvious from an early stage in the investigation that it was Du who did it, obvious from CCTV evidence of his movements and from forensic evidence, including his fingerprints found in blood at the scene. That much is admitted.
However, it is anticipated that Du may now claim that he should not be convicted of murder but should only be convicted of manslaughter on the basis of either diminished responsibility or loss of control...
...Suffice to say, the prosecution does not accept that this is anything other than the clearest case of murder, with the obvious motive of revenge, and any claim otherwise by Du is simply a blatant and transparent attempt to avoid his full responsibility for these grotesque killings.
A Judge has described how Anxiang Du was a "man on a mission" on the day he killed a Northamptonshire family.
Today the man who repeatedly stabbed a family of four was found guilty of murder in what was described in court as a cold-blooded massacre.
A killer who massacred a family of four was able to flee the country after police mishandled a 999 call from one of the victims.