It has been common knowledge for a while that Poland hosted a secret CIA prison where Abd al Rahim al Nashiri and other prisoners now held in Guantánamo were detained and tortured. As Warsaw and Washington struggle in vain to hide this truth from the public, fresh revelations from the Washington Post now confirm that the CIA paid Poland $15 milllion to host that prison. In early 2003, two senior CIA officers delivered the cash in large cardboard boxes to Col. Andrzej Derlatka, the deputy chief of Polish intelligence, and two of his associates.

This is significant news for many reasons. First, Europe’s top human rights court just heard oral arguments in two companion cases brought on behalf of al Nashiri and another Guantánamo prisoner, Abu Zubaydah. The cases challenge Poland’s participation in the CIA’s secret detention program. The fact that Poland received $15 million in cash as reward for its participation further confirms the overwhelming evidence the Court has already received in support of the applicants’ claims in these pending cases.

Second, news of the $15 million payment has created a public uproar in Poland. Even skeptics of the Guantánamo prisoners’ claims are now persuaded of Poland’s complicity in torture; and those who until now clung to the idea that this complicity was driven by lofty Polish ideals cynically recognize the power of money. It will be interesting to see how the Polish authorities decide to respond. Since 2008, they have been dragging out a pending (and ineffective) investigation into the CIA prison. The new revelations raise the question of whether domestic pressure, combined with the pending European Court proceedings, will compel the authorities to stand up to Washington and fess up to the truth. Fifteen million dollars seems a paltry amount for a country like Poland to receive for sacrificing its own constitutional ideals and facing potential censure before Europe’s highest human rights court. (Significantly, in December 2012, the court held that Macedonia had violated the European Convention through its participation in the secret detention and rendition of German national Khaled el Masri).

Meanwhile, in Washington, a 6,000 page Senate intelligence committee report on CIA secret detention and interrogation continues to be withheld from the public, despite the fact that the majority of the committee believes the CIA’s secret prisons and torture techniques were “terrible mistakes.” It is not clear when this report will see the light of day and in what form. What is clear, however, is that the truth will come out one way or another, no matter how hard the Obama administration, the intelligence community’s allies, and Republican lawmakers try to cover it up.

Yesterday the news was about Macedonia’s complicity in CIA torture; today the news is about Poland; tomorrow it will be about Romania and Lithuania, which also hosted secret CIA prisons and also face litigation before the European Court.

Indeed, that the United States co-opted as many as 54 countries into unlawful CIA secret detention and extraordinary rendition operations may ultimately mean that there is only so much the administration can do to cover up the truth. In the face of snowballing disclosures, the U.S. and its partners in torture would be well advised to own up to their responsibility before the truth emerges by other means to embarrass them.