Per the linked article, The ATF agent in question was J.J. Johnson. In my opinion this man should be in prison.
Curiously, this exact name is also the subject of a Georgia Militia conspiracy case linked here:
http://home.earthlink.net/~ynot/gabomb.html
The dude gets around it seems.
Folks, We The People have one last chance to remove this little bastard commie and his commie thug administration in NOvember via the ballot box. If we fail then, there will not be an America in 2016 in which to hold free elections.