B-25C ditched in bay of Bengal June 7, 1942, Pilot Clarke E Johnston

From the book '7th Bombardment group/Wing 1918-1995':
 

Johnston's Aircrew B-25C XX-XXXXX 7 June 1942 11th Bombardment Squadron (M)
 
Ditched in the Bay of Bengal after a combat mission against Aktab, Burma. Aircrew picked up by Colonel Necrason with a CNAC aircraft and crew. One fatality on Johnston's crew.
 
P - Johnston, Clarke E   2nd Lt, O-421112 Rescued
CP - Murphy, Thomas L  2nd Lt, O-436790 Rescued
N - Joffe, Theodore H     2nd Lt, O-789111 Rescued
B - Drew, Troy                2nd Lt, O-724157 Rescued
RO - Cowan, Hiram M    CPL, 19016616     Rescued
G - Ayoub, Joe A            PFC, 18015736     Rescued
*G - ?                            SGT                       5/6 (M-P.I.)? [This means Killed in Action / body not recovered, memorialized
                                                                                       on the Tablets of the Missing, Manila Cemetery in the Philippines] 
*(Unidentified Sergeant from another aircrew)
 

I'm trying to determine the identity of the Sergeant who was KIA. The author presumes he's listed on the Tablets of the Missing in Manila, which would make sense. But without a name it'd be pretty much impossible to figure out who he was. Can anyone point me in the right direction? Perhaps someone has the monthly reports or other paperwork from the squadron the would indicate the man's name. It doesn't appear that there's an accident report or missing air crew report for the incident.
 
Thanks.