Interesting article in the Washington Post:
Before the war in Iraq began, the CIA recruited and trained an Iraqi paramilitary group, code-named the Scorpions, to foment rebellion, conduct sabotage, and help CIA paramilitaries who entered Baghdad and other cities target buildings and individuals, according to three current and former intelligence officials with knowledge of the unit. […]
After Baghdad fell, the CIA used the Scorpions to try to infiltrate the insurgency, to help out in interrogations, and, from time to time, to do "the dirty work," as one intelligence official put it.
In one case, members of the unit, wearing masks and carrying clubs and pipes, beat up an Iraqi general in the presence of CIA and military personnel, according to investigative documents reviewed by The Washington Post and according to several defense and intelligence officials. […]
CIA control over the unit became weaker as chaos grew in Iraq. "Even though they were set up by us, they weren't well supervised," said an intelligence official.