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According to Arthur C. Fiedler's post to the 12 O'Clock High! discussion forum (thanks to Michal Plavec for letting me know), who served in the 317th Squadron, 325th Fighter Group, 15th USAAF, his fellow pilot, 2/Lt William C. Margetts, didn't die on an escort and strafing mission to the Pardubice oil refinery on December 28, 1944 but was seriously injured. He had to belly-landed due to a mechanical failure of his P-51 (Ser. No. 44-15357) north of the town of Pelhrimov, Czechoslovakia, as he didn't manage to open the canopy and to bail out.
There is no evidence of 2/Lt Margetts having joined other pilots of the 325th FG shotting up rolling stock in this area.
Mr. Zdenek Bicik, Czech historian dealing with the air war over Czechoslovakia, wrote 2/Lt Margetts had been captured and stayed in the local hospital until January 3, 1945 when he was transferred to Prague. He died in 2004 in the United States.

Copy of the report of the local police station on this event (in German)
BTW, Capt. Arthur C. Fiedler achieved eight aerial victories during the war and became eight-highest ranking ace of the 325th Fighter Group.
Source: BIČÍK, Zdeněk. Epizoda z prosincového náletu na Pardubice. Zprávy Klubu přátel Pardubicka. 1978, č. 1, s. 6-7.
























