THE 19-year-old son of a Lynnwood Glen, Pretoria, couple charged with the murder of his parents and brother, was on Monday referred for 30 days psychiatric observation at the Weskoppies hospital by the Pretoria Magistrate’s Court. Karl Gustav Greyvenstein was not asked to plead when he appeared briefly before Magistrate C Khoza. He will appear in court again on August 10. Greyvenstein was arrested on July 6, hours after the bodies of his father, Otto, 50, mother, Erika, 49, and brother, Christo, 22, were found in their beds. They had been shot. The father and son died on the scene, while Erika Greyvenstein died soon after admission to the Pretoria East hospital. Greyvenstein claimed he had heard gunshots when he retired to his garden flat after watching television in the main family home.