From Channel 4’s website:

NIAGARA FALLS, N.Y. (WIVB) – The Erie County Medical Examiners office has identified the remains of the female recovered from the Niagara River as Magdalena Lubowska.

The young girl slipped into the Lower Niagara River on August 13 when she was on a hiking trip with a summer camp. Two kayakers discovered the body around 10am Saturday.