I've seen quite a bit of debate over whether the media is mischaracterizing what happened with the whole "SWAT-like teams" bit. Local law enforcement has said they didn't deploy any SWAT units, and, so far as I've been able to find, while the DoE OIG does own some shotguns[1], they don't have any real tactical teams.

Given the way the rest of this has been reported, it's kind of my suspicion that a bunch of investigators in "POLICE" raid jackets and a few shotguns got turned into a "SWAT team" by reporters.

[1] http://usgovinfo.about.com/b/2010/03/18/why-the-dept-of-educ...