The prosecutor in the Anxiang Du murder trial told the court Du killed Mr and Mrs Ding downstairs first before making his way upstairs, leaving a trail of bloody fingerprints, and attacking the girls.
Before "making good his escape" after the brutal attacks, Du washed the blood from his hands and from the knife, the court heard.
The bodies of Mr and Mrs Ding were found in the kitchen, and Alice and Nancy were found dead in an upstairs bedroom - Alice on the bed and her sister on the floor.
Post-mortem examinations found that Mr Ding had been stabbed 23 times, Mrs Ding 13 times, Nancy had 11 stab wounds, and Alice had four.
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.