Just got this from my sister:

Just read in the NY Times that one of the auxillery policemen, Nicholas
Pekearo, who was killed lived in Park Slope. He was also a writer. He
worked at a bookstore on the Upper Eastside. The other man, Yvergeniy
Marshalik, 19, was a student at NYU. He was only 19. His family fled Chechnya  when he was a young boy. He lived in Brooklyn, as well.