A 44-year-old jobless man of Vietnamese origin was sentenced to five years jail by the High Court on Thursday for manslaughter after killing a fellow Vietnamese man with a knife two years ago.

On November 15, 2015, a 58-year-old Vietnamese man was found lying in a pool of blood in Nai Wai village in Tuen Mun in the New Territories and later pronounced dead in a hospital, Sing Pao reported.

The victim was killed by a kitchen knife. He suffered three injuries including a 16-centimeter-long wound to his throat.

The court heard that defendant Nguyen Manh-cuong found the victim and his older brother taking drugs in a subdivided flat in Nai Wai. The defendant got into a quarrel with the victim, which later turned physical.

The defendant left the flat and returned in 10 minutes with a knife and stabbed the victim.

The defendant pleaded for leniency, telling the court that he wanted to protect his older brother from drug abuse, Oriental Daily reported.

The jury was satisfied that the defendant’s action stemmed from him being infuriated by the victim. The defendant was acquitted of murder but convicted of manslaughter.

Judge Ester Toh Lye-ping said although the defendant’s motive was to protect his brother, he still killed a person.