No clue. Only got a glimpse of blood dripping from her hand before she tried to cave my head in. I'm still up for clue-hunting, but one problem with that idea...

[He gestures at the open elevator shaft, smoke still drifting out.]

The elevator in question is a mess of rubble at the moment, so good luck finding anything. If you're hoping for fingerprints, we'll have to climb up and down to every floor that shaft connects to and see if there's anything on any of the call buttons.