A Perth teenager murdered an elderly man as “payback” for being kicked out of a hotel room at the end of a night of heavy drinking, a court has been told.

Pasifique Niyonyishi, now 21, killed Colin Norton, 81, and stabbed his wife Margaret after arriving at their Greenwood home about 8am on March 4, 2024.

Colin Norton died of his injuries, while his wife Margaret survived the stabbing attack.

The attack came about three hours after Niyonyishi had a drunken altercation with his long-term friend and the couple’s son, known as “Charlie”, at the Mercure Hotel.

During his sentencing in the Supreme Court of WA on Monday, the court was told Niyonyishi repeatedly told other friends he was going to kill Charlie for disrespecting him by making him leave the hotel room at the end of a heavy drink

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