Yes, and Mr. Silverback put up some great paintings from his career in post 4. I read that his fifth kill was the well known Vietnamese ace, but I am not sure if that claim held up.
The ace Cunningham supposedly shot down was Colonel Toon, who had 13 kills and was the leading enemy ace. He is also identified as Toom or Tomb.
First, let me say he is almost certainly fictional, (but not made up by Cunningham) because the Vietnamese recognized as their top ace another guy who had 9 kills, and they would never miss a chance to promote Toon if he really existed. Looking about on the internet I've found two kinds of sources: Ones that say Cunningham killed Toon and ones that say it was a misidentification, but not one site mentions how it was known Toon was/wasn't the guy Cunningham killed. There's an anti-Cunningham site (not one of the new opportunists, this guy has hated Cunningham from way back) which quotes some book authors (Vietnam vets) that went to Vietnam and could find no record of Toon. However, I take that person's account and quotation of those books with a grain of salt, because he casts aspersions on Cunningham's war record, saying he isn't a hero because his kill doesn't matter after occurring so late in the war and other reasons that have nothing to do with whether someone was really heroic or not.
Funny how the libs think the Navy's medal system is ironclad when John Kerry gets a Purple Heart for band-aid wounds but is a corrupt swamp if it gives Duke Cunningham a Navy Cross for killing three MiGs in one mission and saving his squadron XO's life.
So...it beats the heck out of me how this happened, or who Cunningham shot down on 10 May 1972.