Interesting progression of events.
Since serious allegations justify fake evidence, I’m going with:
“Sir, I just clocked you doing 65 mph in a 60 mph zone. What’s the rush?”
“Well Officer, with Election Day right around the corner, I need to get all this black powder back to my basement pronto. Can I go now?”
This ABC article gives us some more background:
“authorities got a tip from an unidentified individual in Pennsylvania that Rosenfeld was allegedly communicating with about his plot.”
“Letters and text messages that Rosenfeld allegedly sent to the Pennsylvania tipster detailed his plot, authorities said in a criminal complaint.”
“Rosenfeld’s letters and text messages stated, in substance and in part, that he intended to 1) build an explosive device; 2) transport the explosive device to Washington D.C.; and 3) detonate this explosive device on November 6, 2018, on the National Mall in Washington D.C.”
https://abcnews.go.com/US/ny-man-arrested-alleged-election-day-bomb-plot/story?id=58419955
That’s good enough for me. Straightforward from there, as they say:
- Check out the letters and texts, determine there’s something there
- Get Rosenfeld’s address, find out how what residence(s), car(s), sheds, &c he’s got
- Get a search warrant for explosives &c for his residence(s) and car(s)
- Stakeout at his house
- Follow him in his car
- Pull him over on one of the usual pretexts (2 miles over the speed limit, touching the “fog line”, rolling stop, etc.)
- Bluff him with “we know you’ve got something in the car” just to allow him to incriminate himself, which makes searches easier legally
- Search the car regardless of his answer