I'd guess that relations between German and Portuguese police and prosecutors are a little strained because he was tried and convicted in Germany for an unsolved crime in Prtyugal
That's really unusual - normally new evidence (found in Germany) wouid be relayed to the investigating authorities at the location of the crime, who wouid phen re-open or continue investigations and prosecute if case became strong enough (using EAW to get suspect apprehended and turned over, or extradited some other way)
They didn't do that. I'm assuming there must be a extra-territoriality on the relevant Gernam laws, so a German national can be tried for seriois offences in Germany regardless of where the offence is committed.
So why not prosecuted in Portugal? Were the Portuguese authorities just not interested in prosecuting him themselves? Or did the Germans not want him out of their hands? (There have been enough mentions of other video material,and other crimes that they might have strong reason to want to keep him close and keep him banged up). Or something else?