Peter,
Perhaps you're familiar with this website
http://www.zplace2b.com/464th/jbabincak.htm dealing with said crew and crash.
Story says that two bodies were recovered in Slovakia, Fassnacht and Haigh.
Website wwiimemorial gives FOD (Finding of Death) for Robert Cunningham and not KIA. This may indicate that Cunningham was missing first, but was only found at a later date.
Regards,
Leendert