Karl Hass

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For the classical music radio host, see Karl Haas.

Karl Hass (October 5, 1912, in Kiel, Germany - April 21, 2004, in Geneva, Switzerland) was a Nazi war criminal and mass murderer. Hass was an SS officer and spy who was condemned for his participation in one of Italy's largest massacres of World War II.

In 1934, Karl Hass joined the Sicherheitsdienst, the SS's intelligence service, where his ruthlessness brought promotion. After the downfall of Benito Mussolini and the occupation of Italy by the Germans, Karl Hass was sent to Rome to set up a network of radio operators and to organize saboteurs behind the invading Allied lines. While in Rome, under SS-Obersturmbannführer (Lieutenant-Colonel) Herbert Kappler, Karl Hass aided in the deportation of more than 1,000 Jews to Auschwitz concentration camp.

Karl Hass was also the officer who lured Princess Mafalda of Savoy, the daughter of King Victor Emanuel III of Italy, to his headquarters in Rome with claims that there was a message from her husband who was then being held in Berlin. On her arrival at the German command, Hass had the princess kidnapped and forcibly transported to Buchenwald concentration camp in Germany, where she became one the thousands of people killed by the Nazis in the camp.

Following a March 23, 1944, bomb attack in the Via Rasella by Italian resistance fighters that killed 33 German soldiers, Karl Hass with Capt. Erich Priebke and his fellow officers rounded up 335 Italian men and young boys and the next day transported them to the Ardeatine caves at the outskirts of Rome. Hass, Priebke, and their soldiers systematically executed each captive with a shot to the back of the head. The Ardeatine massacre is one of the most notorious in the Italian history of World War II.

After the War, SS-Hauptsturmführer Karl Hass was captured by the Allies, but rather than being brought to justice for his war crimes, he was apparently employed by the United States Army Counter Intelligence Corps to spy on the Soviet Union. Only Herbert Kappler was ever charged with the Ardeatine cave massacre. In the early 1990s, Capt. Erich Priebke, who had helped Karl Hass with the executions, was found hiding in Argentina by an American television crew and eventually extradited to Italy to stand trial. In exchange for immunity, Karl Hass returned to Italy to testify against his fellow SS murderer. However, on the night before he was due to testify, Hass decided to reneg on his promise to testify, and attempted to flee from his hotel room by climbing down from an outside balcony. He seriously injured himself after slipping and falling from the balcony and was taken to hospital where he ultimately gave testimony to Court officials. In the court records, Karl Hass admitted to executing two civilians but defended his actions by claiming he was only following orders, a defense which has been ruled invalid ever since the Nuremberg trials.

His attempt to flee meant that Karl Hass lost his legal immunity from prosecution, and he was made to stand trial. Tried and convicted for his role in the Ardeatine action, he was sentenced to life in prison in 1998. Because of his advanced age and poor health, Hass was held under limited house arrest in a retirement villa in Switzerland, where he had resided for a number of years after the War. Given the freedom to leave for brief periods, Karl Hass spent his last years among the Swiss Alps, not far from his daughter who visited him regularly from her home in Geneva.