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 Popović shortly after Easter (Orthodox Easter as given by Dedijer: 19 April 1914), for the assassination, as evidenced by the testimony of Ilić, Čubrilović, and Popović at the Sarajevo trial. Three youths – Gavrilo Princip, Trifko Grabež, and Nedeljko Čabrinović – Bosnian Serb subjects of Austria-Hungary, living in Belgrade, testified at the Sarajevo trial that at about the same time (a little after Easter), they were eager to carry out an assassination and approached a fellow Bosnian Serb and former guerrilla fighter known to be well connected and with access to arms, Milan Ciganović, and through him Major Tankosić and