Jewish Police

 

 Metal badge with a Star of David of a Jewish policeman in the Czestochowa ghetto, 1942

Public domain photo from the United States Holocaust Memorial Museum

 I saw this photo on Wikipedia and went to the source to find similar pictures, which were not Public domain, but supplied more info about this issue:

 A Jewish border policeman stands by a guardhouse on a street corner in the Lodz ghetto, with a Star of David on his chest, 1940 – 1944.

 A Jewish policeman helps two women move their belongings to new quarters in the Kovno ghetto. Under this picture I found an extensive explanation about the Kovno ghetto Jewish police force.  The German created it in July 1941.

 There were many more photos of Jewish policeman on other ghettos but they didn't have this Star of David badge on their chests…