Nobody died, meaning:
1) No scummer NK
2) NK, but failed
3) Had it but didn't use it

Option 3 isn't entirely unbelievable, there is precedent for people forgetting to burn a night action from RBIRL and IIRC Yuna, fistofpainx, and I once chose not to use our NK to fake an attack and prob-town a scummer. Still, 1 and 2 are more probable.

Now if 2, odds favor it was foiled BP or doccing in which case we may or may not have intel indicating it got busted up, also dods are if 2 it targted a Night Action Magnet. I'm out, if I got hit, then I don't know it, no Night Message even hinting at such. So we might have a lead on the other hand I don't want our doc proclaiming they intercepted one, still if anyone knows and feels safe saying so, go for it.

I don't want to rule out any of the three options at this point though.