Oxygen’s Snapped revisits the puzzling double murder of Myriam Dienes and Robert Dienes. But the bodies of Myriam Dienes, 56, and Robert Dienes, 67, painted a very different picture. Who Were Myriam Dienes and Robert Dienes? Nicole Nachtman (depicted as a child) murdered her mother Myriam Dienes in 2015. Nicole Nachtman is serving life in prison for murdering her mother Myriam Dienes and her stepfather Robert Dienes.