Prince In 1903, aged 17, George returned to Serbia along with his family, following a palace coup when a conspiracy of army officers overthrew the ruling Obrenović dynasty to proclaim his father as King of Serbia. As a result, George became Crown Prince. Renunciation The Prince had a reputation for being hot-tempered, and on one occasion attacked his tutor, Major Levasseur, who had to be dispatched back to Paris. In 1909 a more serious scandal broke when he killed his valet by kicking him to death. Although there were moves to cover up the murder, the truth came out, and he had to renounce his succession rights. George tried to recant his renunciation on a number of occasions, but was unsuccessful. War service and arrest Prince George participated in the Balkan Wars as well as World War I, where he was severely wounded in the Battle of Mačkov Kamen near Krupanj in 1914. After his father's death and brother Alexander's subsequent coronation, hostilities between the two brothers arose, which led to Prince George's arrest in 1925. He was proclaimed to be insane and locked in an asylum near the city of Niš. Following Alexander's assassination in 1934, George hoped he would be freed by the new regent Prince Paul, but he remained in jail until World War II when he was freed by the German occupiers. Later life and marriage After the war the Karađorđević family was declared enemy-of-the-state by Josip Broz Tito's communist regime. However, Prince George was permitted to retire in Belgrade as the only member of the royal family allowed to remain in the country. In 1947, at the age of 60, he married Radmila Radonjić (1907–1993), a member of the Radonjić noble family, who held the hereditary title of guvernadur of Montenegro, granted to them by the Republic of Venice in 1756 and were in constant political opposition and rivalry with George's maternal family, the House of Petrović-Njegoš. The couple did not have any children. He wrote his memoirs Istina o mom životu (Truth About my Life). He died on 17 October 1972 in Belgrade and was buried in St. George's Church in Topola, SFR Yugoslavia. His death came the day after the tenth anniversary of the death of his sister, Princess Helen of Serbia. Interest in mathematics While he was crown prince, George developed a close friendship with the mathematician Mihailo Petrović Alas, who had