n't include audio, but a witness reported that Freeland-Gaither yelled for help, police said. The video shows Freeland-Gaither tussling on the ground with her abductor and being forced into a four-door vehicle, which police say may be a gray Ford Taurus. Her glasses and cell phone were dropped onto the road during the struggle. Just before the vehicle pulled away, Freeland-Gaither broke out one of the passenger side windows, police said. Police described the abductor as an unknown black man of medium-heavy build, 25 to 30 years old. The video shows him wearing a dark jacket with a hood, a dark hat and dark pants. Freeland-Gaither's family told CNN affiliate WPVI that she worked as a nurse and was just blocks from her home when she was abducted. Investigators are n't sure whether she knew her abductor, though there's no indication on the Philadelphia surveillance video that she did, Wilson said. Police have n't publicly talked about a possible motive. Authorities initially said the abductor's car had a Pennsylvania license plate, but Wilson said Tuesday that investigators are looking into whether a Maryland plate was on the car's front. The plate is n't readily legible in the video, and police said no witness gave them a plate number. Mulero said her granddaughter lived with her for four years in Maryland before Freeland-Gaither returned to Philadelphia to be with other