The Krim family announced on Facebook on Thursday that they're expecting a baby boy this fall.
The Krim family say they miss the slain children Leo and Lulu and think of them every day.
Experts discuss how to screen nannies after Yoselyn Ortega allegedly killed two children in her care.
Detectives want to question nanny Yoselyn Ortega, but she's in a 'catonic state,' sources said.
Police said Yoselyn Ortega may have been seeking help before she allegedly killed Lulu and Leo Krim.
Kevin Krim is trying to stay strong for his wife and surving child, his dad says.
Marina Krim came home to find two of her children, Lulu and Leo, stabbed to death.
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