Prisoners were divided into categories . At first , they were classified by the nature of the crime for which they were accused , but eventually were classified by the specific authority-type under whose command a person was sent to camp . Political prisoners who had been arrested by the Gestapo wore a red badge , " professional " criminals sent by the Criminal Courts wore a green badge , Cri-Po prisoners arrested by the criminal police wore a brown badge , " work-shy and asocial " people sent by the welfare authorities or the Gestapo wore a black badge , Jehovah 's Witnesses arrested by the Gestapo wore a violet badge , homosexuals sent by the criminal courts wore a pink badge , emigrants arrested by the Gestapo wore a blue badge , " race polluters " arrested by the criminal court or Gestapo wore badges with a black outline , second-termers arrested by the Gestapo wore a bar matching the color of their badge , " idiots " wore a white armband with the label '' Blöd '' ( Stupid ) , and Jews , whose incarceration in the Dachau concentration camp dramatically increased after Kristallnacht , wore a yellow badge , combined with another color
Kristallnacht
Kristallnacht
Dachau concentration camp