The man who authorities say tried to carry out a mass shooting in Yellowstone National Park last year spewed ... federal prosecutors said Samson Fussner, 28, planned the potential mass shooting ...

In a new court filing, federal prosecutors allege the suspect who took a hostage and got into a shootout with Yellowstone National Park rangers in July ranted ... suspect's actions an act of terrorism ...

‘To call this a crime of violence is quite the understatement’: Judge detains two men accused of tying up, killing 63-year-old man ...