in slave trade -LRB- slavery -RRB- , rape , incest , assault and deprivation of liberty , Sedlacek 's office said . If convicted , he could face life in prison . Austria does not have the death penalty . `` This man obviously led a double life for 24 years . He had a wife and had seven kids with her . And then he had another family with his daughter , fathered another seven children with her , '' said Franz Polzer , a police officer in Amstetten , the town where Fritzl lived , at the time of his arrest . The case first came to light in April 2008 when Elisabeth 's daughter , Kerstin , became seriously ill with convulsions . Elisabeth persuaded her father to allow Kerstin , then 19 , to be taken to a hospital for treatment . Hospital staff became suspicious of the case and alerted police , who discovered the family members in the cellar . Fritzl confessed to police that he raped his daughter , kept her and their children in captivity and burned the body of the dead infant in an oven in the house . Elisabeth told
-LRB- CNN -RRB- -- Josef Fritzl , the Austrian accused of keeping his daughter in a cellar for decades and fathering her seven children , will plead guilty to rape and incest when his trial opens Monday , Fritzl 's lawyer told CNN . Josef Fritzl is expected to plead guilty to rape and incest on Monday , his lawyer tells CNN . However , Fritzl will deny other charge he faces : murder , enslavement and assault , attorney Rudolph Mayer said Sunday . The 73-year-old expects to spend the rest of his life in prison , Mayer added . Fritzl faces six charges in a closed-door trial . The trial is scheduled to last five days , but Mayer said it could be shorter . Fritzl was charged in November with incest and the repeated rape of his daughter , Elisabeth , over a 24-year period . But he was also charged with the murder of one of the children he fathered with her , an infant who died soon after birth . State Prosecutor Gerhard Sedlacek said Michael Fritzl died from lack of medical care . In all , Fritzl is charged with : murder , involvement