The story may combine several different incidents.
At the end of this link there is a brief mention of some B-29 crewmen stripped naked and executed in front of villagers.
https://www.pacificwrecks.com/aircra...704/index.html
The two "possible" planes mentioned were "Kickapoo Lou" 42-24678 and "Lethal Lady" 42-6370. The exact fates of some of the B-29 crews lost on the various Singapore raids is still confused and remains unknown.