Veljko Čubrilović Veljko Čubrilović Veljko Čubrilović (Serbian Cyrillic: Вељко Чубриловић; 6 June 1886 – 3 February 1915) was a Bosnian Serb who was involved in the assassination of Archduke Franz Ferdinand of Austria. He was born in Gradiška, Bosnia and Herzegovina and became a schoolteacher in Priboj Majevički. In 1914, as a member of the Black Hand secret society, he agreed to help Gavrilo Princip, Nedeljko Čabrinović, and Trifko Grabež assassinate Archduke Franz Ferdinand. His brother, Vaso Čubrilović, was also involved in the plot. On Sunday, 28 June 1914, Franz Ferdinand and Sophie von Chotkova were assassinated by Gavrilo Princip. Princip and
Assassination of Archduke Franz Ferdinand that Austria-Hungary had been an "occupier". Princip's weapon, along with the car in which the Archduke was riding, his bloodstained uniform and the chaise longue on which he died, are on permanent display in the Heeresgeschichtliches Museum in Vienna, Austria. The bullet fired by Gavrilo Princip, sometimes referred to as "the bullet that started World War I", is a museum exhibit in the Konopiště Castle near the town of Benešov in the Czech Republic. The bronze medallion of Ferdinand and Sophie, which was part of a monument that was erected on the site of the assassination and demolished in 1918