Erika Menendez, 33, pleaded guilty to first-degree manslaughter in the death of 46-year-old Sunando Sen.
Police are looking for the man who pushed Wai Keuen Kwok, 61, in front of a subway train Sunday.
Police are looking for the man who pushed Wai Kuen Kwok onto the tracks of a Concourse subway station.
Erika Menendez was transferred to Elmhurst Hospital's prison ward for women with mental illness.
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