IMO, that's precisely what makes it all the more troubling and far-fetched seeming, that it doesn't happen with any regularity. Nor should it ever. Nevertheless, people get grabbed and killed. Mostly, we never get to know why that person, at that moment, in that place.
Caleb was maybe a few hundred feet from his apartment when he took a picture of a misty bridge in the neighborhood, its lights veiled in fog. Maybe it was cool outside, inviting, an easy way to clear your head after a long night, a few drinks with your friends and roomies, new dog walks, etc. A simple, quiet, barefoot stretch while he was waiting on his UberEats order. I have no problem seeing him take that stroll, none at all.
I sincerely struggle to understand why it seems easier for some to put this down to a hook-up gone wrong, especially as signals back and forth around that kind of activity surely would have surfaced in digital footprints by now, no matter how scant the details.