Dr Karl Lutz

In the short story The Erymanthian Boar, Dr Karl Lutz is a doctor and a fellow guest with Hercule Poirot at the Swiss mountaintop resort at Rochers Neiges. He came from Vienna but, being Jewish, he had been turned out of the country. Lutz told everyone that he was a specialist in psycho-analysis, but Poirot later revealed that he was in fact a plastic surgeon. Being short of money, Lutz had accepted a large sum from the killer Marrascaud to operate on him and change his physical appearance.