Anxiang Du, 55, denies mudering a Northamptonshire family of four.
Mr Harbage told the court that Du, "having massacred the Ding family", stole their car and went in search of another man, Paul Delaney, who had become involved in the civil litigation and lived elsewhere in Northamptonshire.
"Fortunately for Mr Delaney, Du did not find him," Mr Harbage told the court.
Du then fled; he drove to London where he took a coach to Paris, then travelled down through France and Spain to Algeciras on the Mediterranean coast where he took a boat to Morocco.
It was from there that he was brought back to the UK earlier this year, the court heard.
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.