(CNN) -- A New Jersey woman placed a camera in the room of her 91-year-old mother so that family members could see her, but what was caught on camera has shocked the family and led to an arrest.
The footage shows a home health aide beating the 91-year-old woman, who suffers from Alzheimer's disease.
The health aide, 52-year-old Carmen Pereira, was charged with aggravated assault and other charges related to what was captured on the video footage, said Mike Post, a detective from the Jersey City Police Department.
In the footage, the aide is seen tending to the elderly woman, forcefully brushing her teeth or putting her in bed by picking her up and slamming her down.
The video also shows the aide repeatedly slapping the woman and yanking her hair.
Pereira was arrested September 2.
Along with aggravated assault, she faces charges of endangering the welfare of an elderly person and neglect of an incompetent person, Post said.
CNN's Deborah Brunswick contributed to this report.