Marina Krim

Marina Krim, whose husband, Kevin Krim, is a CNBC digital media executive, wrote that Ortega's family had nicknamed little Nessie "Rapida y Furiosa," (or Fast and Furious), for her exuberance and energy. But

Thursday evening, the children's mother, Marina Krim, took her 3-year-old daughter home from a swim lesson to find her other youngsters, ages 2 and 6, dying of knife wounds in the bathtub of their Upper West Side apartment near Central Park.

 Ortega then turned the blade on herself, police said. The nightmarish case of a nanny accused of stabbing to death two children in her care stunned the family's well-to-do neighborhood and caused legions of parents to wonder how well they know who is watching their kids.

 The nanny, Yoselyn Ortega, lay in critical condition Friday with what police said were self-inflicted knife wounds, and investigators were unable to question her, in part because she was still breathing with the help of a tube.

Her motive and mental state remained a mystery, authorities said, and no charges were filed. Police were looking into whether Ortega, a 50-year-old naturalized U.S. citizen who had worked for the family for two years, had recently sought psychiatric help.

Detectives were searching her home in Washington Heights, a working-class neighborhood north of where she worked and near Harlem.

 There are tens of thousands of nannies working in New York City, but reports of serious violence by caregivers against children are exceedingly rare. Parents are accused of killing their own children with far more frequency.

 This is very devastating tragedy for the family of Marina Krim.Why Yoselyn Ortega did this stupid things in the little kids of Marina Krim. What is her motives to do this such crime.

The police will continue investigate Yoselyn Ortega.

 All i can say give justice Marina Krims children.