Elderly woman had been complaining of abuse for 3 years

Yahoo! Singapore News, 11 Jun 2011
The man who had secretly recorded his mother's abuse at Nightingale Nursing Home revealed that he did so in response to her complaints about their treatment.
The 41-year-old, who identified himself as Mr Zhuo, told Shin Min Daily that of the four years his mother, Madam Bai, had stayed at the home, she had been complaining to him for about three years. This triggered his decision to place a hidden video camera disguised as a clock by his mother's bed at the home. Full story