Police say the surveillance video they released helped find Erika Menendez.
The Queens District Attorney says Menendez implicated herself in Thursday's crime.
He says she told officers she quote: "pushed a Muslim off the train tracks because I hate Hindus and Muslims ever since 2001 when they put down the twin towers."
Witnesses to the death say they saw a woman pacing the elevated platform and muttering to herself just before she pushed her victim.
This was the second time this month someone was shoved to their death in front of an approaching train.