Salt Lake City police are investigating the roles of two self-described "peacekeepers" following a fatal shooting at Saturday's protest that left one person dead and another injured, raising questions about unauthorized security at public demonstrations.

Police said that Arturo Gamboa, 24, never shot his rifle, but that he was arrested on a murder charge and accused of creating the dangerous situation that led to the death of protester Arthur Folasa ...

Retired U.S. National Guard Major General Randy Manner joins Katy Tur to share why he attended the "No Kings Day" protests against the Trump administration's policies and to criticize President Trump'...