Found at a lighted window, captured and measured. Appears to be Rasahus hamatus, based on the key quoted here, and other images.
This seems to be a Southeastern species--this is our first for North Carolina--most other records are from farther south.

Amusing personal note: I heard this at the window (curtains closed) and thought it sounded a bit like a beetle, but a little too fluttery--going outside, I found it was a hemipteran! (This is an obscure talent--I can recognize some species of insect from my area by the particular sound they make when hitting my living room window.)
Image updated 5/13/20--larger.