The FBI‘s use of a Network Investigative Technique (NIT) to obtain info from the computers of visitors to a seized child porn site has run into all sorts of problems. The biggest problem in most of the cases is that the use of a single warrant issued in Virginia to perform searches of computers all over the nation violated the jurisdictional limits set down by Rule 41(b). Not coincidentally, the FBI is hoping the changes to Rule 41 the DOJ submitted last year will be codified by the end of 2016, in large part because it removes the stipulation that limits searches to the area overseen by the magistrate judge signing the warrant.