But the report emphasized the department’s inability to investigate allegations of police misconduct — key to the public’s distrust of the department. One reason is the absence of a permanent leader in the Public Integrity Unit, the report said. Harrison had named Michelle Wilson as the deputy commissioner to oversee the unit in May but reversed course two days later. Wilson had previously signed a sworn affidavit questioning the truthfulness of Baltimore State’s Attorney Marilyn Mosby in connection to a lawsuit.