The only "abuse" of government power here is the slap-on-the-wrist administered to the perp, presumably because of his right-wing politics and his pink skin. If you are poor or black and you use a gun in the commission of a crime on federal lands, while pointing that gun at law enforcement, I can guarantee you that you will not have those charges plea-bargained away. 

Only in America could these serial criminals get a veritable slap-on-the-wrist and their defenders still cavail over the supposed "injustice" and "abuse." No doubt at all that these same individuals' voices are among the loudest of those screaming for the full application of the rigor of the Law when the perp does not have the magic white skin and right-wing politics to merit a Get Out of Jail Free card.