Poland Police held a training on improving analytic and procedural methods for “X Files” investigations in Poronin from 13 to 16 October. The course was organised by the Criminal Bureau of the Police Headquarters, for leaders of sections and teams handling unsolved crimes in provincial and capital police units, and for the Unit for Unsolved Crimes at BK KGP. The training focused on how to run analytic and procedural activities in ongoing preparatory proceedings conducted by police and prosecutors under the “X Files” approach. It brought together the people responsible for leading work on cases that have not been solved. The programme took place in Poronin over four days, 13 through 16 October.