Martin James Monti (October 24, 1921 – September 11, 2000) was a United States Army Air Force pilot who defected to the Axis powers in October 1944 and worked as a propaganda broadcaster and writer. After the end of World War II, he was tried and sentenced for desertion; he was then pardoned but subsequently tried for treason and sentenced to 25 years.
https://en.wikipedia.org/wiki/Martin_James_Monti