The War Diaries for VMO-4 are on fold3.
https://www.fold3.com/image/287151160
For June 24 they record "Ten missions were flown; six artillery and five infantry missions." Not too sure about their math?? But there is no mention of anything else happening.
Richard Louis Orrok was a pilot killed on June 19 when his engine failed and he crashed into an ammo dump. Only his observer was rescued before the dump exploded.
https://www.findagrave.com/memorial/...rd-louis-orrok
For the month of June they record 1 OY-1 "lost in combat" (serial number not given).
and 3 OY-1s "lost operational". Their serial numbers were 60500, 60502 and 60498.
VMO-2 was also on Saipan, but a check of their War Diary for June does not show any loss on June 24 either.
So..... Perhaps there was an army liaison squadron that had the loss of Terry?