The Russians prohibited Karađorđe from returning to the Balkans to take part in the Second Serbian Uprising. Karađorđe objected and traveled to Saint Petersburg to plead his case, but was arrested and detained. Upon his release, he joined the "Filiki Eteria", a Greek nationalist secret society that intended to launch a pan-Balkan uprising against the Ottomans. The "Filiki Eteria" promised Karađorđe a position of military leadership in the planned uprising and offered to smuggle him into the Pashalik of Belgrade. Karađorđe secretly entered the Pashalik on , crossing the Danube together with his servant, Naum Krnar. He then contacted his "kum", Vujica Vulićević, who offered him an abode in the oak forest of Radovanje Grove, near Velika Plana. Unbeknownst to Karađorđe, Vulićević was on Obrenović's payroll. After escorting Karađorđe and his servant to a tent in the forest, Vulićević informed Obrenović of Karađorđe's whereabouts through a courier. Shortly thereafter, he received a letter from Obrenović telling him that Karađorde was to be killed. Vulićević enlisted one of his close confidantes, Danilo Novaković, to take Karađorđe's life. The following morning, just before sunrise, Novaković snuck into Karađorđe's tent and axed him to death while he slept. He then went to the riverside and shot Krnar with a rifle as he was gathering water. Karađorđe's lifeless body was beheaded. His severed head was taken to Belgrade and presented to Marashli Ali Pasha, who had been appointed the governor of the Pashalik two years prior. Ali Pasha had the head flayed, stuffed and sent to the Sultan himself.