You can join Fold3 for free for a week and download the Missing Air Crew Report (MACR). 
http://www.fold3.com/Do a search in the WWII section under Missing Air Crew Reports, search 9925 and then Clint Castleberry separately.
The aircraft involved were B-26G 44-67861 and 44-67866. Not sure which aircraft he was on.
44-67861, MACR-9925, Pilot -Krawesyk, Arthur D 
44-67866, MACR-9925, Pilot - Deadwyler, Joseph L Jr 
http://www.fold3.com/image/?ann=5486516 ... 139117347/http://forum.armyairforces.com/tm.aspx?m=67247&mpage=1http://www.b26.com/guestbook/2004.htmDate: 
12/5/2004 
Time: 
8:55 PM   
My name is Scott Clemens and I am conducting research on Lt. Clint Castleberry, Jr., who was killed when his B26G, 44-67866, was lost off of the coast of Africa on November 7, 1944. I have obtained a copy of MACR 9925, which details the search for 44-67861 and 44-67866, both lost on the same date. The documentation includes orders from the 1103d AAF Base Unit Caribbean Division, ATC, which seem to detail the ferrying flights for seven B26G’s. I have not been able to find any information on where the aircraft were headed or what happened to them. I am obviously most interested in 44-67866, but the others are:   
44-67859 
44-67862 
44-67863 
44-67854 
44-67853 
43-34575   
The MACR indicates that the two aircraft lost on 11/07/44 left five minutes apart from Roberts Field and were not flying in formation.   
Any information is greatly appreciated.   
Scott   
Scott, 
The B26's you note were all destined for delivery to the Free French Air Force, and would have been delivered to Rabat in Morocco. Where the USAAF crews would go to thereafter is open to surmise. By this time both the 9th.AAF and the 1st Tactical Air Force were operating from European bases. If you have the MACR then you probably have all the information available. Unless there is an eyewitness account I cannot see any further avenues of approach.   
Regards, 
Trevor Allen 
historian b26.com