"I remember one set of twins in particular: Guido and Ina, aged about four. One day, Mengele took them away. When they returned, they were in a terrible state: they had been sewn together, back to back, like Siamese twins. Their wounds were infected and oozing pus. They screamed day and night. Then their parents – I remember the mother's name was Stella – managed to get some morphine and they killed the children in order to end their suffering"

D: