U.S. treaty obligations and policy have been implemented through regulations issued by the Department of Justice, the Department of Homeland Security, and the State Department, that codify the United States' commitment not to send individuals to another country where they are likely to be tortured. Among other protections, these binding regulations require that individuals facing deportation or extradition be given an opportunity to be heard on the likelihood of torture in the country to which they are facing return. The Arar case suggests that either those procedures are not being followed, or that they are inadequate

“Figuring out exactly what the US role was in handing Mr. Arar over to Syrian authorities will help assess existing procedures designed to prevent torture,” said Massimino. “The administration should launch an investigation immediately that looks into, and reports publicly on, the circumstances of this case.”

If you are not familiar with the Lawyers' Committee for Human Rights, here is their mission statement:

Since 1978, the Lawyers Committee for Human Rights has worked in the U.S. and abroad to create a secure and humane world by advancing justice, human dignity and respect for the rule of law. We support human rights activists who fight for basic freedoms and peaceful change at the local level; protect refugees in flight from persecution and repression; promote fair economic practices by creating safeguards for workers' rights; and help build a strong international system of justice and accountability for the worst human rights crimes.