private detective agencies
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“Portrait of Eugène Vidocq, Adventurer and Security Police Chief,” by Achille Devéria, c. 1828. Wikipedia Commons: Musée Carnavalet, Paris. Note the caricature embellishments. In June 1827, Vidocq resigned from his position as security squad chief, ostensibly because he disagreed with how the Paris Prefecture of Police was being run. Others from within the Prefecture were concerned
