The Detroit Police crime lab has been closed indefinitely due to a pattern of mishandling evidence and returning incorrect findings on ballistics tests. A recent study showed the lab erred in approximately 10% of its tests, a finding that could result in countless appeals and the overturning of numerous convictions. Among other disturbing findings, the lab was shown to have restricted access to evidence, to have administered no competency tests for its employees, and to have exposed much of the evidence in its possession to contamination.