Attack on students in Rhode Island,

 'person of interest being held and nothing said further'.  Which does give suspicions, though the 48-hour rule definitely in effect.

And then, in Australia, no real doubt who's responsible.
At least 11 killed as terrorist attack targets Jews at Sydney’s Bondi Beach
Insty ran across this, an attack in London as well

If you carry, ever, do it everywhere/when you legally can.