The case centered on the extraordinary rendition of a Muslim cleric, Osama Mustafa Hassan Nasr, or Abu Omar.

CNN: Italy pardons U.S. Air Force officer in rendition case

The case centered on the alleged extraordinary rendition of a Muslim cleric, Osama Mustafa Hassan Nasr, or Abu Omar, who said he was seized on the streets of Milan in 2003 and then transferred to Egypt and tortured.

CNN: STORY HIGHLIGHTS

The proceedings center on the alleged kidnapping of Osama Nasr Mostafa Hassan, an Egyptian-born Muslim cleric also known as Abu Omar, in February 2003.

CNN: Berlusconi may be called in CIA 'kidnap' trial