I am a nephew of LT Thomas E Cartmell USAAF, the pilot of the P-61B that was shot down by American friendly fire on April 26, 1945, while on a night intruder mission over the Dillingen Bridgehead. After reviewing the burial records contained in his IDPF file, the site of the crash was identified as in the vicinity of Altishein, T 308201 (military map coordinates). I had a knowledgable friend help me translate this location into contemporary coordinates of 48.73777 10.87816. Tom was initially buried in the German military cemetery in Reutti. His remains were later moved to the US military cemetery in St. Avold, France.
I have produced a website that provides more detail about the incident, and moreover a collection of all of his wartime letters written to his family. I've also posted all of the related documents (flight logs, etc.) that belonged to him or were related to him. You can view this site at
https://brooksidepress.org/cartmell/