NEW YORK — The Manhattan subway killer who shot a Goldman Sachs researcher at random got away — but not before he was caught on surveillance video, police revealed Monday. The images were tweeted out by NYPD Commissioner Keechant Sewell, who asked the public’s help identifying and finding the suspect in what she called the “tragic, senseless shooting” of Daniel Enriquez, 48. “We need all eyes on this,” Sewell said of the photos of the suspect. The Goldman Sachs researcher, heading to brunch with friends, was sitting in the last car of a Manhattan-bound Q train as it approached the Canal Street…