I am spending the week at FB headquarters in Menlo Park:
(That’s me looking out for the thief. He’s around here somewhere.)
I assume that the axe-wielding troll had already been killed and turned into mist, since the room was empty. Oddly enough, there were no bloodstains. Neither were there gashes on the wall possibly made by an axe.
Fabulous adventures in coding 
The object in the bottom right of the picture looks eerily like a CRT monitor with about a 1″ beige frame.