My questions for Clayton (which he can respond either here or on Twitter):

1) Key card locks usually have a log of when they were accessed. Did they show any cards accessing the room at the time the stuff was stolen?

2) You said they claimed you left the door "unlocked". What do they mean by that? Those doors lock automatically. What was their response when you (presumably) brought that up to them?

3) Have you spoken yet to the hotel manager about the matter?