December 29, 2012 -- Updated 0219 GMT (1019 HKT) Police released a sketch of the suspect, who they say was wearing a ski jacket and sneakers. NEW: The victim has been identified as Sunando Sen, 46, of Queens The assailant paces, then pushes the man onto the tracks, police say The New York Police Department on Friday identified the victim as Sunando Sen, 46, of Queens. Police describe her as a heavyset woman in her 20s, wearing a ski jacket and sneakers. Security video shows her running from the scene shortly after 8 p.m. Thursday. Sen's roommate, Ar Suman, 33, told CNN on Friday that after living together for over a year they had become like "family." "I came home and I heard this happened," said Suman, "I am feeling very bad." Sen owned a shop called New Amsterdam Copies and was a graphic designer for posters, according to Suman. Naeem Davis, 30, a homeless man, has been charged with second-degree murder in that case. CNN's Jesse Solomon and Rande Iaboni contributed to this report.