I heard a US Army officer being interviewed on NPR a couple of days ago. He was talking about the Iraqi police's 8th brigade, which was being sent for retraining after "poor performance" on their latest review. The reporters inquired further, and the officer said that they had conducted operations in an area that they were not authorized to conduct operations in at the time. The reporters inquired further, and found out that members of the brigade had raided a meat-packing plant, taken out 26 workers, and killed six of them, apparently an act of ethnic cleansing.
I wonder how exactly "retraining" is supposed to help. I guess someone figured they must have bungled their raid pretty badly, to have raided an entire meat-packing plant, and only been able to kill six people.