Just the clarify, the NOLA killer was born in the U.S., served ten years in the military, and had gainful employment following his service. It's pretty obvious he was radicalized at some point, but this incident may or may not be a prelude to a larger initiative.
On the Las Vegas incident, interesting that the officer noted they were able to track the vehicle from Colorado though Tesla charging stations. Unless your ventures take you within your EV's home charging range, you'll probably leave a bread crumb everywhere you go. That, along with a growing number of plate reading cameras, means your vehicle is tracked most days. And, let's not get started with the tracking device in your pocket.