A joint bulletin issued in early August by the Department of Homeland Security and FBI warns state and local law enforcement agencies to look out for people in possession of “large amounts” of weapons and ammunition, describing the discovery of “unusual amounts” of weapons as a potential indicator of criminal or terrorist activity.
... According to the bulletin, weapons could be stored in an “individual’s home, storage facility, or vehicle” and may include common firearms such as “rifles, shotguns, pistols” as well as “military grade weapons.” ... While the bulletin never clarifies what constitutes a “large” or “unusual” quantity of weapons or ammunition, it does say that such a quantity would “arouse suspicion in a reasonable person.”
... The suspicious activities described in the bulletins are derived from criteria in the Information Sharing Environment (ISE) Functional Standard for Suspicious Activity Reporting signed in 2009. The ISE Functional Standard governs the collection of information for the Nationwide Suspicious Activity Reporting Initiative (NSI), an interagency program to collect suspicious activity reports from law enforcement agencies around the country. ...
Like other bulletins in the DHS-FBI series on suspicious activity reporting, the document notes that “constitutional activities should not be reported” unless the circumstances “support the source agency’s suspicion that the behavior observed is not innocent, but rather reasonably indicative of criminal activity associated with terrorism, including evidence of pre-operational planning related to terrorism.” However, no guidance is provided on potential legal issues related to the reporting of constitutionally-protected activities.Note: The photo is from the bullitin according to the article.