After the war, Knežević remained in exile and was tried in absentia alongside others. He was found guilty of treason and war crimes and sentenced to 10 years imprisonment with hard labour, loss of political and civic rights for 5 years, confiscation of all property, and loss of citizenship. The sentence of imprisonment with hard labour was to commence from the date of his future arrest. He emigrated to Canada where he was the editor of "Glas kanadskih Srba" ("Voice of the Canadian Serbs"). In the early 1950s, an acrimonious dispute arose between Cvetković and Knežević. Knežević wrote an article in the international relations journal "International Affairs" claiming that Prince Paul and Cvetković had formulated a secret plan to ally Yugoslavia with Germany and to gain control of the port of Salonika while Greece was defending against the Italian invasion. While Cvetković issued two strong denials in the historical journal "Dokumenti o Jugoslaviji", and stated that seizing Salonika had never been on the agenda of the Yugoslav government, his latter statement was not true. The main purpose of Knežević's allegation was to discredit Prince Paul and portray the coup plotters in a favourable light. Knežević died in Toronto on 22 June 1983.