DFCP, that would be Franz von Werra.
Despite the efforts of the Canadian Government to obtain his return, and of the United States Authorities to hold him, von Werra crossed the border into Mexico. Travelling by way of Peru, Bolivia, Brazil and Spain, he reached Berlin on 18th April, 1941.
On October 25th of the same year, while on patrol, his plane was seen to dive into the sea. No trace of von Werra was found.
After his return to Germany, he was awarded the Knights Cross of the Iron Cross. But he also reported his experiences whilst in captivity, which led directly to improved standards being applied to Allied POWs.
By the time he suffered engine failure over the North Sea in his Bf 109-F4, he had achieved 21 victories, 13 of which were gained after his escape from Canada.