Experts discuss how to screen nannies after Yoselyn Ortega allegedly killed two children in her care.
Lulu and Leo Krim, 6 and 2, were allegedly killed by their nanny Yoselyn Ortega at 57 W. 75th St.
Police said Yoselyn Ortega may have been seeking help before she allegedly killed Lulu and Leo Krim.
Marina Krim came home to find two of her children, Lulu and Leo, stabbed to death.
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