One can only speculate however I feel the need to let you know that on the DD-214, where it list's awards earned, if your reference to Southwest Asia Service Medal w/3 bronze stars is part of the 5 then that is not a bronze star in the same capacity as what you may be thinking.
Those just represent that the soldier was part of the entire operation and is listed on all SWA Service Medals that I am aware of. There may have been some awarded without all of the stars but I doubt it.
• Operation Desert Shield, August 2, 1990 – January 16, 1991
• Operation Desert Storm, January 17, 1991 – April 11, 1991
• Southwest Asia Cease-fire Campaign, April 12, 1991- November
Also the National Defense Service Medal was once again authorized a bronze star device for 1991. That would make 4 total.
There was a standing order in our major command that no one under the rank of E-7 was to receive a medal higher than an ARCOM and that only E-7's and above could receive the actual Bronze Star. Our Supply Sergeant received the Bronze Star.... He played allot of cards to earn that too. There has been a great deal of controversy in the Air Force and other branches of the service as to the awarding of the medal to those not in combat. The major difference is that one awarded for valor or heroics were afforded the 'V' Device which signified Valor. Usually if one did something that earned an award for 'FOR GALLANTRY IN ACTION' then they were awarded the Silver Star and not the Bronze Star.
There are also other ribbons that are authorized the bronze star vs the oak leaf cluster however I will leave the 5th to your desires.
Good luck on finding information on your brother and your quest for more knowledge of his service.
ref;
http://en.wikipedia.org/wiki/Southwest_ ... vice_Medal http://en.wikipedia.org/wiki/Bronze_Star_Medal http://en.wikipedia.org/wiki/National_D ... vice_Medal