A New South Wales supreme court judge said that Waterlow, 44, was suffering from paranoid schizophrenia when he killed his father, Nick, 68, and sister, Chloe, 37 during a family dinner in Sydney in November 2009. Nick Waterlow, who was born in Hitchin, Hertfordshire, was a celebrated art curator who did everything possible to help his son but was afraid of his violent mood swings.