According to NY1, the suspect is described as:
Police describe the suspect as a man in his early 20s, with a thin build and short, black hair that is spiked up. He was seen wearing a black t-shirt and white sneakers. The suspect was described as driving a black four-door sedan with tinted windows and a beige cloth interior.Anyone with information regarding the suspect should contact the Crime Stoppers hotline at 1-800-577-TIPS, or text CRIMES, then enter TIP577.
What they don't include in this instance is that he is also described as White. (I think it's the silliest "rule" that news agencies can't/won't mention physical descriptions that touch on race. Like that's not part of your physical being? How about was he pale or tanned? Medium-toned skin or sallow? Did he have a clean-shaven face or stubble? Pimples or scars? Don't these all go together?)
The Borough Park area has been no stranger to people who decide to abuse children. Here are a couple of links to other, relatively recent, stories.
Man abuses children in parks.