i don't think you can give him penalty because that would be against the promise made to portugese govt.
Moreover, i think life is given by god and we don't have any right to snatch it away from anyone.
He took many lives but violence is never ended by violence.
We should give him 5-6 years of penalty, since he is still young, and then we could give hima suitable employment and make him realise that honest living is good living. We should not kill criminal, but crime.
He needs support and understanding and with love and care i don't think there is anything that cannot be conquered.
