Authorities say the 19-year-old victim had just taken a seat on the downtown D train from West 155th Street and Eighth Avenue around noon Sunday when he noticed the suspect standing across from him, touching his groin area over his clothing.
The suspect directed the victim to get off the train with him, which they did at West 59th Street, and get on another southbound train. They got off the second train at West 50th Street, where the suspect took the victim to the end of the platform and forced him to engage in a criminal sexual act, officials said.
Police say the suspect took the victim's backpack after the assault and boarded an arriving E train. The victim got on the train also, took back his backpack and took a photo of the suspect with his cell phone (above) before getting off the train.
Anyone with information about the suspect or the attack is asked to call Crime Stoppers at 1-800-577-TIPS (8477).