They were all former bodyguards of the Governor of Arkansas, William Jefferson Clinton. He gave a nice eulogy for them at the Treasury Dept, his speech should still be online at the Treas website, or searching on the four names together will dredge it up.
So I guess the idea is that they were purposely put in the line of fire so they could be taken out? I could see this happening....
This was just an aspect of the Waco fiasco I am unfamiliar with.