I'm still completely for death penalty but, what Lou said is completely right. trying to stop violence by more violence isn't very sensed.
The idea of "eternal jail" that Lina gave isn't too bad, it even sounds great!!!
I don't know who in the Brazilian Government would do it though.....
The only problem with your idea Lina, is where will the government find enough money to build very high security jails and how do you know where to find policemen that are not too easily to corrupt? I'm not saying that only brazilians are corrupted but man in general likes money and the more he gets, the better. That's the problem. Anyway, every system has a problem and they soon will find a way to evade themselves.
Death penalty's problem is that they sometimes kill innocent people. Nothing is perfect..........