A German spy sent to Canada during WWII used his funds to move to Ottawa and then surrendered to Canadian authorities

On May 14, 1942, Marius A. Langbein was dropped off at St. Martins, New Brunswick, Canada. He was a Russian spy looking to record shipping movements in Montreal and Halifax, Novia Scotia. His mission was code named Mission Grete (Langbein's wife). These two locations were the main departure points for North Atlantic convoys during WWII.

However, it seems that Langbein wasn't cut out to be a spy. He had lived in Canada before the war and must have liked it because he decided to settle down again. Instead of spying, he used his mission funds to move to Ottawa and start a new life.

He eventually surrendered to Canadian authorities in 1944. He was tried before a jury for spying, but they found him not guilty. He had never committed any hostile acts against Canada.

(Source)