Abu Zubaydah, an American prisoner, has suggested that he was held at the facility and tortured with techniques that may have included waterboarding. Polish authorities have granted Zubaydah victim status for the purposes of their ongoing investigation, which seeks to identify and charge those who operated the facility, incarcerated people there beyond the boundaries of Polish law, and subjected them to torture and abuse. The probe has concentrated on the role played by Polish authorities who collaborated with the CIA. These officials have consistently told investigators that they had no access to the facility and did not know what the CIA was doing there. The U.S. Justice Department has refused to cooperatewith the investigation.
[..] other criminal investigators probing into CIA extraordinary renditions, including ones in Germany, Italy, Spain, and the United Kingdom.
First Criminal Charges Brought in Polish Probe of CIA Black Site—By Scott Horton (Harper's Magazine)