Cylinder, I see your point, and you say that the safeguards are upheld by the courts, the constitution and by congress, and I have insufficient knowledge to dispute this. How is this demonstrated (if at all) to the American public? For me, the 'argument of expectation' stands because having a government official, elected or otherwise, tell me that 'justice has been done, but we can't prove it' is a more than a little worrisome.
Detention as a combatant is on its face. Congress declared that the United States was at war with al Qaeda. The person with constitutional authority to conduct that war - which, under the US Constitution is the President - gets to make certain decisions regarding that responsibility. If someone disagrees with the constitutional nature of the power asserted, they have access to US courts to challenge that assertion. Courts do not get to decide if it is a good public practice, they simply decide if the Constitution grants that power and, if so, if the way that power is currently being used prohibited in any of its manifestation by other rights granted to the people.
And the points you make are more relevant during 'time of war' but how long has the US got to be free of attack before the 'war' is over?
That's a legitimate question to which I do not know the answer. The question has not been raised practically since the US is being attacked on a daily basis by al Qaeda forces in Afghanistan and Iraq and are allies are being targeted such as in London, Bali, Madrid and Amman. The term, such as I illustrated in the Hess example is indefinite in the sense that the future is unknowable.
When are these draconian powers revoked?
Never. They are enshrined in the Constitution.
...indeed, the decision over when to end these special powers (The Patriot act, am I right?)
No, the USA PATRIOT Act is a separate issue entirely. It allows certain law enforcement practices such as wiretaps and national security letters. It has nothing to do with arrest and detention powers per se. It changes how the US government can gather information about terrorist suspects.
...will be made using information protected by it, so in theory there can be no attack on US soil for years, and the security services can keep using these powers because the population would have no access to information that would be relevant in ending them.
I really don't know exactly how to answer this. The US population doesn't really begin or end states of war under the US system - Congress and the president does. The population (through voters) choose their congressional representation and the president. They have access to whatever information is in the public record to base these decisions on.
At some point, the president will report that the objectives set forth in the Authorization of the Use of Military Force (AUMF) resolution has been achieved. That will be the statutory end of the war powers granted him by the constitution. It's unclear to me if Congress could expire the AUMF unilaterally. The President with consent of the Senate could also enact a treaty ending the war with al Qaeda.
At some point, the courts may weigh in and cancel his authority with the opinion that a state of war no longer exists though this is unlikely in the extreme. Instead you might see a much narrower view on powers of detention because of the protracted nature of this particular war. It seems that the president is trying to cooperate with the spirit of previous SCOTUS rulings in this regard.
Hey, it's your country, but if I were you, I'd be worried!
(ETA - and isn't the suspect in US law, still an innocent man, or has that been revoked too?)[/QUOTE]