The area around Riverwalk is well-lit at night and considered safe. The staircase on the other side of Port Imperial Blvd. sees little traffic after dark and is bounded by shrubs and trees. Portions are out of sight of the road and other buildings.
The victim was checked for signs of sexual battery and investigators are looking to match any DNA samples, according to reports.
The police are searching for the perpetrator and ask for any information from the public.