So, why is Gitmo an exception?

The American Psychological Association…overwhelmingly approved a new ban on any involvement by psychologists in national security interrogations conducted by the United States government, even noncoercive interrogations now conducted by the Obama administration…

The vote followed an emotional debate in which several members said the ban was needed to restore the organization’s reputation after a scathing independent investigation ordered by the association’s board.

That investigation, conducted by David Hoffman, a Chicago lawyer, found that some officers of the association and other prominent psychologists colluded with government officials during the Bush administration to make sure that association policies did not prevent psychologists from involvement in the harsh interrogation programs conducted by the C.I.A. and the Pentagon.

…The ban was approved by the association’s council by a vote of 156 to 1. Seven council members abstained, while one was recused…

The final vote was met by a standing ovation by many of the council members, as well as the large crowd of observers, which included anti-torture activists and psychology graduate students who had come to the meeting to support the ban. Some wore T-shirts proclaiming “First, Do No Harm,” a reference to the physicians’ Hippocratic oath.

RTFA for all the gory details. I think it stands as mute testimony for the sentiment solidly rooted in many Americans that war criminals like George W Bush and Dick Cheney should stand trial for their crimes.

Psychologists are also still assigned at the American military prison at Guantánamo Bay, Cuba, where they oversee “voluntary” interrogations of detainees.