Thanks to an ACLU victory in federal court, we know much more about how CIA doctors violated the medical oath to “do no harm.”

One of the most important lessons of the CIA’s torture program is the way it corrupted virtually every individual and institution associated with it. Over the years, we have learned how lawyers twisted the law and psychologists betrayed their ethical obligations in order to enable the brutal and unlawful torture of prisoners.

Now we’ve won the release of a 90-page account of the CIA’s Office of Medical Services role in the CIA torture program — a secret history written by the top CIA medical official, whose identity remains classified.

The history reveals that CIA doctors were hunting for a “truth serum” to use on prisoners as part of a previously secret effort called Project Medication. The CIA studied records of old Soviet drug experiments as well as the CIA’s notorious and discredited MK-Ultra program, which involved human experimentation with LSD and other drugs on unwitting subjects. The CIA doctors involved in Project Medication wanted to use Versed, a psychoactive drug similar to some of those used in MK-Ultra, on prisoners.

The CIA ignored lessons from its own history. After MK-Ultra was shut down, the CIA director testified in 1977, “It is totally abhorrent to me to think of using humans as guinea pigs.” But decades later, the agency decided to experiment on humans again, testing pseudoscientific theories of “learned helplessness” on its prisoners.

While Project Medication never got off the ground, CIA medical professionals remained critical participants in experimenting with torture. Just like the government lawyers who tried to give unlawful torture a veneer of legality, the secret history reveals that CIA doctors were “indispensable” to the effort of “legitimizing the program.”

Perhaps the most striking element of the document is the CIA doctors’ willful blindness to the truth of what they were doing. CIA doctors decided that waterboarding actually “provided periodic relief” to a prisoner because it was a break from days of standing sleep deprivation. Similarly, CIA doctors decided that when a different prisoner was stuffed into a coffin-sized box, this provided a “relatively benign sanctuary” from other torture methods. CIA doctors described yet another prisoner — who cried, begged, pleaded, vomited, and required medical resuscitation after being waterboarded — as “amazingly resistant to the waterboard.” Incredibly, CIA doctors concluded that the torture program was “reassuringly free of enduring physical or psychological effects.”

The truth is that CIA torture left a legacy of broken bodies and traumatized minds. Today, with a president who has vocally supported torture and a new CIA director who was deeply complicit in torturing prisoners, it’s more important than ever to expose the crimes of the past. Recognizing the roles played by the lawyers, doctors, and psychologists who enabled torture is critical to making sure it never happens again.