Radonjić, who was exiled to the coast, continued to have treasonous correspondence with the Austrians in Kotor. When some of his letters to the Austrian officials were discovered, he was apprehended by Njegoš's warriors, taken back to Cetinje and put on trial for treason alongside his brother Marko on . The two were accused of inciting Serbs to flee from Montenegro and settle in neighbouring Austrian lands, and of conspiring to overthrow Njegoš so that the Radonjićes could surrender Montenegro to the Habsburgs, making it an Austrian protectorate. They were found guilty of treason once again, but this time they were immediately driven into exile. Radonjić died of natural causes on , shortly after being forced from Cetinje.