elisabeth a lift at night and for her to leave the baby on the door step at a time when she wouldn't have been seen. >> fritzl's closest neighbors bought his story, too. >> translator: people said that it was irresponsible. what a bad mother elisabeth was just to leave the children on the doorstep. frau fritzl already had seven children and now she has to bring up grandchildren, as well. terrible. >> incredibly, over the 24 years elisabeth was in captivity, there were more than 100 tenants renting rooms in the fritzl house right above elisabeth's prison. none suspected. >> translator: in hindsight, you can always claim that you heard something, like knocking, but that simply isn't the case. i can't recall ever hearing knocking or anything at all. and if i heard something, what could i have done? it could have been children playing. you don't know. >> after the first child was abandoned in 1992, social services paid some 20 visits to the house.