Saydnaya prison is notorious for being a closely held secret, and until recently little was known about how it operates. Earlier this summer, Amnesty released a separate report on the prison that detailed its living conditions. But these new interviews outline a structured means to kill those opposed to Assad—everyone from factory owners to students and professors. The report shows how Assad’s regime has executed these men in ways deliberate, and highly conscious of how, if exposed, the global community would denounce such acts. Amnesty investigators interviewed 84 people, including former prisoners, guards, judges, and the doctors who signed off on the death certificates of those killed at Saydnaya. These interviews show a human rights crisis that the Syrian government has sanctioned since at least 2011, and which could pose a problem for the new Trump administration.

The Trump administration has repeatedly said the U.S. would work “with any country” in order to eradicate ISIS. Trump has specifically referenced his willingness to work with Russia, and he has already discussed this with Russian President Vladimir Putin. Russia, meanwhile, has backed the Syrian government in the country’s six-year civil war, saying it shares a common interest in defeating ISIS. Syria has used this same smokescreen as excuse to target civilians with bombs and to arrest dissenters. And, according the Amnesty, the executions inside the Saydnaya prison are authorized by the highest-level officials in the Syrian government, including the Grand Mufti, and either the minister of defense or the chief of staff of the Army, both of whom act on behalf of Assad.

Saydnaya is operated by Syria’s Military Police. It had once housed members of captured militant groups, but in July 2011 the government packed it full of those deemed dangerous to the Assad regime. Since the beginning of the civil war, Syrian soldiers and intelligence officers have raided neighborhoods seen as hostile to the government, rounding up people often on little more than rumor. Some in the prison have found themselves detained for years only because they marched in peaceful protests.

Once they arrive, the guards throw them a “welcome party,” a euphemism that one detainee, a former attorney, described like this:

“You are thrown to the ground and they use different instruments for the beatings: electric cables with exposed copper wire ends... Also they have created what they call the ‘tank belt,’ which is made out of tire that has been cut into strips... They make a very specific sound; it sounds like a small explosion. I was blindfolded the whole time, but I would try to see somehow. All you see is blood: your own blood, the blood of others.”

Along with the beatings, guards were ordered to torture prisoners psychologically, often by forcing them to rape each other, or by withholding water from detainees so they could not wash away the excrement that had piled up in their cells. Guards also deprived the prisoners of medical care and food. One detainee, who used the pseudonym “Jamal,” told Amnesty: “I remember we were lying down and looking to the ceiling, for hours and hours. There was one piece of ceiling that fell, and one of our cell mates ran to it. He started eating it. He thought it was bread. He had been one of the most refined, educated men in Damascus.”