Two unpublished investigations show that the United States has consistently overlooked killings and torture by Iraqi government-sponsored Shi'ite militias.
It was one of the most shocking events in one of the most brutal periods in Iraq’s history. In late 2005, two years after the U.S.-led invasion toppled Saddam Hussein, U.S. soldiers raided a police building in Baghdad and found 168 prisoners in horrific conditions.
Many were malnourished. Some had been beaten.
The discovery of the secret prison exposed a world of kidnappings and assassinations. Behind these operations was an unofficial Interior Ministry organisation called the Special Investigations Directorate, according to U.S. and Iraqi security officials at the time.