How did that happen?
“Enforcement” of their rules, regs, order, mandates etc, I’m guessing. DHS was most likely involved in promoting it, too. I’ve read some articles over the past year, here on FR and other sites, about their heavy-handed tactics, shootouts etc.
Here’s just one:
http://forfeiturereform.com/2011/12/21/not-every-government-agency-needs-a-police-force/