In the early hours of March 1, 2015, Danish police received an alarming call from a nurse at a provincial hospital. She suspected her colleague, fellow nurse Christina Aistrup Hansen, of deliberately killing patients-and she feared it had just happened again. Soon, other coworkers revealed their own concerns about Hansen. Indeed, some had been harboring suspicions about her for years . . .
So why had no one come forward sooner? And with the alleged victims already cremated, where was the evid...