NEW : The father is a CNBC executive , officials familiar with the case say . The nanny was next to the body with what appeared to be self - inflicted stab wounds , police say . She 's in critical but stable condition , the city 's police commissioner says . The slain children were 5 and 6 years old .
NEW : The father is a CNBC executive , officials familiar with the investigation say . The nanny was next to the kids with what appeared to be self-inflicted stab wounds , police say . She 's in critical but stable condition , the city 's police commissioner says . The slain children were 1 and 6 years old .