A Long Island caretaker was arrested this week in the heinous abuse of an 83-year-old woman in her care that was caught on video, police said Friday. A guardian of the victim had placed a camera in the elderly woman’s Woodmere home after finding bruises on her late last month, Nassau County Police said. The surveillance equipment allegedly captured the victim’s caretaker, Merlyn Fredericks, 36, yanking the helpless old woman harshly and beating her in her face and body, authorities said. The guardian notified police, and Fredericks was arrested Thursday and charged with felony assault, as well as endangering the...