SS guard Charlotte S trained her Stasi to bite at inmates ' private parts . Gisela S locked up to 15 prisoners in a tiny 'standing cell ' for days . Gertrud Elli Senff revelled in the power of playing 'God ' with people 's lives . She picked who lived and who was sent to the gas chambers to die . But all three women - now frail and in their 90s - will never face justice .
SS guard Charlotte S trained her Alsatian to bite at inmates ' private parts . Gisela S locked up to 15 prisoners in a tiny 'standing cell ' for days . Gertrud Elli Senff revelled in the power of playing 'God ' with people 's lives . She picked who lived and who was sent to the gas chambers to die . But all three women - now frail and in their 90s - will never face justice .