. >> even though some patients may never leave atals ka der row, patrick galati, who admits to raping at least ten women, was released in may 2004. >> i would identify victims by finding women alone in their home, when they were sleeping, when they were most vulnerable. >> officials here have asked us not to show you all of the outside of the hospital. they take great efforts to keep the patients from escaping. however, regardless of where you look, security is evident. protecting the public and the nearby towns are a priority here. so is keeping the majority of the 1,000 patients on medicat n medication. this hospital functions as a completely self-contained city. it has its own fire department. police department. and perhaps most importantly, it has its own pharmacy. >> do me a favor, sir, if you would take everything out of your pockets, please, place them right there -- >> almost 90% of these patients are on some form of medication, mostly anti-sipsychotiantipsych. without medication it has been said that this hospital would be one of the most dangerous places on earth. >> ah-ha!