Normally I'd agree but this Master Gunney seems like a slightly bad apple.
Even before he was implicated in the LAPD "ring", they'd discovered that he "misappropriated" automatic weapons from Iraq, body armor (a big no no), and other booty (what, a toilet from al Faw palace at Camp Victory?).
And then the briefcases, record books, and other documents which sound as of they were classified, but maybe not.
So he was facing some serious trouble even before the LAPD classified materials came into the picture.
Looks to me like he gave up his pals so as to avoid prosecution on his less noble and less valorous hobbies.
And note that he's portrayed as a kind of tool rather than a principal in the LAPD case.
Looks to me like he might have been getting ready for something.