>> reporter: now only the staudte women are left. diane, her darling rachel, 12-year-old brianna and sarah living their secluded lives. >> i think they closed the doors even tighter, because you didn't see them outside. i don't know how they even got their mail, because we didn't see them at the mailbox. >> reporter: then the following june, could it be true? the staudte plague strikes again? this time it's sarah. diane has seen this end badly before, so she takes her 24-year-old daughter to the emergency room. sarah is sick, goes to the hospital gravely ill. >> sarah's in, in very grave condition. it does not appear that she is going to survive. >> reporter: sarah's kidneys shut down. the pancreas and other organs failing. worst of all, her brain is hemorrhaging blood. diane turns to facebook, maybe "asking for prayers as my daughter sarah is in critical condition." diane's brother-in-law michael staudte is floored by the post. >> wow, it's like a lot of bad luck here in this family. what's going on? >> reporter: a good question. what is