This article analyzes the Polish police narrative on Roma during the interwar time, unveiling attitudes and potential practices. According to the police journals and handbooks, Roma were mobile and disposed to theft and deceit. Their tradtitional crafts were merely a smoke screen for illicit activities. As countermeasures, searches for caravans, meticulous checks of identity documents, indicriminate fingerprinting of Roma suspects, among several measures, were recommended. This narrative constituted a part of a larger police professional discourse and is likely to be an indicator of practices on Roma. Polish police followed the contemporary European expertise on Roma produced by the fileds of criminalistics and criminology. As there were no dicriminatory laws targeting Roma in Poland, it appears that police used legislation against begging and vagrancy, among other tactics.