Police are hoping surveillance video will help nab a suspected sexual predator in Brooklyn.
Investigators say he attacked four women in a four-hour span last Wednesday night.
In one instance, they say he followed a 22-year-old woman to her apartment building near Pacific Avenue and Nostrand, pressed her up against a wall, and assaulted her.
Police say he then attempted three other similiar attacks in the area, telling at least one of the victims that he had a knife.
Anyone with information on the case should contact the Crime Stoppers hotline at 1-800-577-TIPS, or text CRIMES and then enter TIP577, or visit www.nypdcrimestoppers.com.