And trademark infringement is enforced by homeland security? Also, AFAIK, enforcement by customs occurs after a court order issues.
DHS took over Customs. One of Customs' jobs is to stop items that violate our IP from entering the country. A common example of their legitimate enforcement in relation to trademark is when they seize shipments of counterfeit designer clothes and watches. I do not believe it requires a court order.
If you have a valuable trademark or copyright, you can register it with Customs so they will know to look out for counterfeit items entering the country and detain or sieze them. If you're not registered and they still catch something, they may still detain items in the case of a clear and obvious infringement, but will not detain items that are simply suspected of infringement.
What I don't understand is telling a store to remove items from the shelf. All the directives I've seen say to sieze or detain the items. In a circumstance such as this, it already being in the country in stores all over, I'd expect an infringement suit against the manufacturer by the holder of the IP, but of course this one would have been thrown out immediately.