The NYPD is looking for a man who allegedly sexually assaulted a woman on the subway earlier this month, and they're asking the public for assistance in their search. Cops say the assault occurred on May 15 at around 3 a.m.; a 21-year-old woman was riding a southbound 4 train when she says an older man sat next to her, exposed himself to her and tried to keep her from leaving the train as it entered the Saratoga Station in Brownsville, Brooklyn.

A female conductor on that train told the Times that she saw the woman fleeing the suspect on the station's platform, whereupon she ushered her into a car and shut the train's doors before the suspect could get back on. "As I go to close the rear, I see a young lady screaming and hollering to me at the top of her lungs," the conductor, who wished to remain anonymous, said. After shutting the doors, she made eye contact with the suspect. "He started cursing me," she told the Times. "I told him, ‘You’re a rapist. They’re going to get you.’" The conductor also says there was another passenger at the time of the alleged assault, but he made no move to stop the suspect. "He did nothing," she said.

Cops say the suspect fled the station and disappeared after heading down Livonia Street; they believe he is a black male between the ages of 25-30, about five-foot-eleven to six feet in height, wearing a green and blue waist length windbreaker jacket and dark blue jeans. They encourage anyone with information to contact the Department's Crime Stoppers unit at at 1-800-577-TIPS (8477), or by texting tips to 274637 (CRIMES) and entering TIP577.