Irma Grese
Grese was nicknamed "the Hyena of Auschwitz" () by prisoners there because of the cruel ways she treated them. After World War II ended, Grese was put on trial for war crimes at the Nuremberg Trials. She was convicted of crimes against humanity for the things she did at Auschwitz and Bergen-Belsen. She was executed in 1945 at age 22. However, according to A. Pierrepoint (British executioner of Grese) as she was questioned by RSM O'Neil prior to the execution, she gave her age as "Twenty-one".