__Editor’s note: This article has been updated to include new details released by the U.S. Attorney’s Office of the Eastern District of North Carolina and confirmation that Nix is no longer serving in the Army following the original publication of this article on Sunday, Aug. 18.__ Kai Liam Nix, a 20-year-old Army soldier tied to extremist threats against a Raw Story reporter, was arrested on Aug. 15 and is being detained in a North Carolina jail on a “federal hold,” Raw Story has confirmed. The New Yorker, which published an extensive article Sunday about right-wing extremism, further detaile…