Private First Class Harold Lloyd Carpenter, 19 017 738, Air Corps, United States Army was assigned to 4th Chemical (Aviation) Company, Fifth Air Force when captured 7 May 1942. He was reported missing from 23 May 1944 and declared officially dead from 7 September 1944 on 22 April 1945. No remains were ever recovered. There's a memorial inscription on the Tablets of the Missing, American Battle Monuments Commission Manila Cemetery at Fort Bonafacio, Luzon, Philippines.
I have very little on the 4th Chemical (Aviation) Company and nothing on Fifth Air Force (?) being stationed at Salt Lake City at any time during - or after - the war (Fifth Air Force was constituted and organized in the Philippines).
You can request his deceased file. You'll find practical instructions at Message #2112.