Her 1-year-old daughter survived the fall.
Malaysia Goodson, 22, was found dead on the platform at the 7th Avenue/53rd Street station in Midtown Monday night.
Police said she was carrying her daughter down the station's stairs when she fell. A stroller was found next to the victim, but it is unclear if the child was in it at the time. Goodson may have been attempting to carry both the stroller and the child separately when she fell.
Goodson's brother, 23-year-old Dieshe Goodson, told Eyewitness News that his little sister was like a twin and that she "died trying to protect her baby."
The baby of their four siblings, Malaysia "always watched out for people," he said.
"She was very protective," he said. "I'm going to be honest, I don't know what to do. She was my best friend."
Detectives are trying to determine if Goodson had a medical issue that led to the fall.
The baby is now in the custody of her father and grandfather.
The MTA issued the following statement:
"This is an absolutely heartbreaking incident. While the ultimate cause of the event is being investigated by the MTA, medical examiner, and the NYPD, we know how important it is to improve accessibility in our system. The Fast Forward Plan acknowledges and prioritizes this work as one of four key priorities, and aims to ensure that riders will never be more than two stops away from a station with an elevator. This will be accomplished through the addition of up to 50 elevators over the next five years. We believe this is an important issue of practicality and equality, and once accomplished, riders will never be more than two stops away from a station with an elevator."
The 7th Avenue/53rd Street station, which services the B, D and E lines, does not have an elevator, according to the New York Times. Only about one-fourth of the MTA's 472 stations have elevators, the Times reported.
"The lack of accessibility in our subways is literally killing people," New York City Council Speaker Corey Johnson tweeted.
The lack of accessibility in our subways is literally killing people. I am heartbroken by this tragedy, and am keeping this family in my thoughts. NYC must do more for families and the disabled. https://t.co/X2w91JdKtD— NYC Council Speaker Corey Johnson (@NYCSpeakerCoJo) January 29, 2019