A chronology of the events that led to the discovery that Josef Fritzl, 73, had locked up his daughter in an cellar dungeon for 24 years and fathered her seven children, based on police statements: _ April 19: Fritzl brings a 19-year-old woman to the intensive ward of the Provincial Clinic, in the lower Austrian town of Amstetten. He tells staff that the woman, Kerstin, is his granddaughter and that he found her in front of his door, left there by his daughter who disappeared decades ago to join a sect. _ April 22: Lower Austrian police ask for DNA...