Maj. Matthew Miller said in his opening statement that Sgt. Santos A. Cardona harassed prisoners for "nothing more than the entertainment of the accused and the enjoyment of the other corrupt cops serving on the night shift at Abu Ghraib."

But defense attorney Harvey Volver said Cardona, a 32-year-old military policeman from of Fullerton, Calif., followed the law and obeyed orders at a time when the Pentagon was pressing for intelligence and the chain of command at the prison was broken.

Human Rights First attorney Hina Shamsi is attending and the courts martial trial and blogging about it. at the trial. Via e-mail, Human Rights First asks:

Cardona's lawyers are expected to call Maj. Gen. Geoffrey Miller to the stand. Gen. Miller has been a central figure in much of the detainee abuse scandal, with many questions not fully examined regarding his role and that of the Pentagon in establishing abusive interrogation and detention policies.

It's clear from testimony of other officers that senior leaders bear significant responsibility not only for the abuses at Abu Ghraib, but also throughout Iraq, Afghanistan and at Guantanamo Bay. We're hoping you will help us increase public awareness about this lack of accountability - and shine a spotlight on the important proceedings as they unfold this week.

This week we hope to find out: Who ordered what? What was the policy? When were interrogation approaches like the use of dogs, sleep deprivation and nudity authorized or prohibited or permitted? Hopefully we will get some answers.