The parents of two children prosecutors say were stabbed to death by their nanny six years ago are now asking the public to think positive as the criminal case finally goes to trial.

The children's mother, Marina Krim, came home from a swimming lesson with her third child and that is when she says she found her 6-year-old and 1-year-old dead in the bathtub.

With jury selection underway, the couple now urges anyone concerned for them to spread thw word about the family's nonprofit, The LuLu and Leo Fund, which supports creative education in schools.

The nanny, Yoselyn Ortega, has pleaded not guilty to murder.