Virtual news blackout on this, aside from a brief blurb on their local news that gives no details at all. The following quote was taken from an alternative news source:

On Sunday January 6th Staff Sgt. Nathan Haddad, a decorated combat veteran, was driving through Jefferson County New York when he was randomly pulled over for a vehicle check. Haddad, who had five 30 round empty magazines in his possession, was arrested by the Jefferson County Sheriff’s Department and charged with five felony counts.

It looks like he was subject to one of the random "stop and search" things the NYSP is infamous for, where they pull over random motorists and subject them to a full vehicle search including the contents of the trunk and luggage.

Official local media release:

http://www.wwnytv.com/news/local/LeR...185853881.html

Other, unapproved, coverage:

http://legalinsurrection.com/2013/01...ion-magazines/

http://beforeitsnews.com/survival/20...s-2458572.html

http://offgridsurvival.com/decoratedcombatveteran-arrested-newyorkfelonies-armagazines/