A Major in an intelligence billet sounds like a brigrade S-2 to me. I don't know anything about Murtha's actual service, but generally the most valorous thing an S-2 does is stand the S-1 to some drinks at the O-club. Since the paperwork for awards is initiated in the S-1 shop, conveniently located next door to the S-2, one might suspect a whiff or cronyism.
That said, staff officers may spend a lot time writing each other up for awards, but a Bronze Star with a V-device does seem like a stretch for a paper pusher. I'd love to hear from someone who was there. (Problem may be there was a lot of log rolling in that unit, everybody writing everyone else for awards so they could get promoted to an even better billet.)
One retired Army Major General told me that he told a retired Army Colonel to his face that the staff officers in his Divison were not "defending America" in VietNam but writing up paperwork for medals for one another.
From what I've read, Murtha has trouble remembering what wounds the Purple Hearts were issued for...or at least has three or more stories floating out there. I doubt that real Purple Heart wounds would be difficult to recall.