jackie taylor installed a security system, so-called granny cams, in her house, when her elderly fathere meant to give her peace of mind. but what they recorded did anything but that. 90-year-old john taylor, a stroke victim, lies defenseless, as his nurse repeatedly beats him over and over again. >> she just was angry right from the beginning, shaking her finger at him and just pounding him in the chest and the stomach. >> john's daughter, jackie, catches it all on a security camera, she installed on her home to be her eyes and her ears while she's away. i mean, of course, anger and shock immediately. >> the video sickens jackie. this was a woman she trusted. a woman she considered a friend. >> she would say, jackie, you're like a daughter to me. you know, mother's day, i bought her flowers, things of that nature because even in the short period of time she was here, i thought we bonded pretty well. >> it all begins two months earlier. jackie's a single woman, working seven days a week, to pay for her dad's soaring medical expenses. so she hires anna to care for her father. he suffered