Several charges of accessory to murder of a federal agent, both before and after the fact, would do quite nicely, though.
So then, you're saying "it isn't state sponsored terrorism when we do it!", no?
After all, Fast & Furious was about our government arming another country's domestic terrorists. (Drug cartels use violence and the threat of violence to terrorize the Mexican government officials who are not wholly corrupt; search up on Mexico's beheadings .)