I think you're confusing multiple things here. Guantanamo is not the same category as police torture in Germany by police forces. Guantanamo would be comparable to German soldiers guarding a prison in Afghanistan and arresting people there. Do you really need sources to convince you that German "prisons" in Afghanistan (and maybe other countries) exist and operate independently of both German law (because it isn't German citizens getting locked up) and local law ? I also don't think it very far fetched that the "rights" of prisoners in those prisons are not getting respected at all by (amongst others) German soldiers.

So you should only compare German police using torture Police, FBI or DEA or some department like that using torture inside America on American citizens. There I think it's much, much less clear that the rate of torture in Germany is higher or lower than the rate used by American law enforcement agencies. I'd guess the rate in Germany would be lower, but not that much, simply because America has many more regions where heavy violence against the police happens very often.

As for what the BND does, is it really so hard to find ? http://www.globalresearch.ca/germanys-intelligence-service-b... http://www.theguardian.com/commentisfree/2013/oct/04/german-... ...

(note that information they forwarded, they obviously collected first, so yes, it does in fact prove the BND spies on all German citizens as part of normal operations)