Which is probably a critical flaw. There are mental health specialists popping out all the time when something like this happens, saying that some individuals are simply beyond rehabilitation - they will never be normal, harmless members of the community. That's the force letting serial rapists loose on the streets after conviction, and it obviously doesn't work.
This is what you get when you have lawmakers specialized at lawmaking instead of the matters those laws are supposed to regulate.
True, true. Under finnish law, he would've been put into a mental hospital in the high-security, enclosed department (a.k.a. the radar-department), meaning that he will stay there throuhout the time he was sentenced to, and after that he would stay until he is cured. Practically meaning, the rest of his life.
In the city were i live in, there's a mental hospital of the same sort. It's a bit secluded from the rest of civilization with the regular patients having their own buildings with a park and other recreational oppurtunities. Then there's the enclosed buildings for people with severe mental problems, each patient usually have a nurse or two around them for their own security. These people seldom get back to the 'regular' world.
Then there's the high-security building in the far back, with metal-doors with electric locks, the windows are barred and the park is enclosed from the rest. The nurses are usually big, buffed males, equipped batons and pepperspray. Serial-rapists, psychopats and people like him roam around there. I know of only person actually getting out of there a couple of years ago. The guy had killed and dismembered his wife with an axe over a disagreement on the amount of coffee one should serve. 45 years later he was released, since he was deemed as not a danger to society anymore. Being over 80 years old, the guy lived in a flat for a couple of years before dying of old age. The neighbours remember him spending lots of hours at the local cafeteria, drinking a lot of coffee.