“Antisocial Elements”
A black triangle identified at least 1,200 German prisoners at Neuengamme as “antisocial elements”. This group was made up of poor or homeless people, alcoholics, and so-called “shirkers”. During the war, an increasing number of people who had violated the wartime economic regulations, had made illegal contact with foreign slave labourers or POWs, or hadn't followed the strict work rules also received black triangles. Until 1945, a total of more than 70,000 people classified as “criminals” or “antisocial elements” were imprisoned in the concentration camps by the police. Around half of these prisoners were murdered there.

Further reading at the Learning Center
“Anti-Social Elements”