New York ( CNN ) -- For the second time in a month , a man has been shoved to his death in front of a train on a New York City subway platform , police said . The New York Police Department on Friday identified the victim as Sunando Sen , 46 , of Queens . Police are searching for a woman seen running from an elevated station for the No . 7 train in Queens on Thursday evening , Deputy Commissioner Paul Browne said in a statement . According to witnesses , the woman was pacing the platform and talking to herself shortly before pushing the man onto the tracks as the 11-car train entered the station . The man 's body was pinned under the second car after it came to a stop . 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 . In early December , Ki-Suck Han , 58 , was shoved onto the tracks in a Times Square station as a train approached . 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 .
NEW : The victim has been identified as David Smith , 46 , of Queens . The assailant paces , then pushes the train onto the tracks , police say . It 's the second time in a month someone has been pushed in front of a train in New York City .