NEW : The victim has been identified as Sunando Sen , 46 , of Queens . He was found dead in his apartment on the first floor at about 1:30 a.m. It 's the second time in a month someone has been pushed in front of a train in New York City .
NEW : The victim has been identified as Sunando Sen , 46 , of Queens . The assailant paces , then pushes the man 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 .