The guy was reported by his MOTHER after he started talking about how life wasn't worth living, etc.:
http://www.foxnews.com/politics/2010/12/21/christie-commutes-sentence-man-sent-jail-owning-guns-legally/On Jan. 2, 2009, Aitken, an entrepreneur and media consultant with no prior criminal record, muttered to his mother that life wasn't worth living after a planned visit with son was abruptly canceled at the last minute. Aitken then left his mother's home in Mount Laurel as she called police, who later found two locked and unloaded handguns in the trunk of his car.
<...> In an e-mail to FoxNews.com this month, Joel Bewley, a spokesman for the Burlington County prosecutor's office, said "no evidence" was presented during the trial to support Aitken's claim that he was moving at the time of his arrest. And despite an appearance on FoxNews.com's "Strategy Room" in August 2009 to discuss his case, Aitken did not testify at his trial.
"However, his roommate testified that they had been sharing the Hoboken apartment since June 2008, and that he had seen the guns at the apartment in September 2008," Bewley wrote. "
mother testified that he had been living in Hoboken and working in New York City since June 2008. This incident occurred in January 2009."