Why would SeeBS expose this? Something smells rotten here.
First, the MSM is not under direct control of a dictator. They act the way they do out of ideology and group-think. People at CBS may see this story getting out in the new media and think that it is worth while. They may see it as a way to reinforce the need for more gun control, because it shows weapons going to drug cartels. There is always the possibility of factions within the left working against each other for their own purposes. Much of the control of the left is very brittle. It depends on not being challenged in any meaningful way, of eliminating their opposition by defining them out of existence. It is much harder to do that with the new media and this story, which is quite compelling.