The Justice Department, specifically, has announced a review of FBI cases to see if technicians misrepresented lab reports and testimonies that might have led to wrongful convictions. The DOJ will scour at least 21,000 cases conducted by the FBI Laboratory's hair and fibers unit before 2000. But there's another issue. About three dozen FBI agents trained 600 to 1,000 local and state technicians, and if the feds are using faulty methods, then it stands to reason that the local labs they trained with those methods aren't doing much better. Cases at these local labs, however, won't undergo the same review, even though the problems could be just as widespread.