I feel like someone was in the apartment both while I was out on Friday and overnight. After I checked in, I left to meet my daughter for dinner. I locked both the deadbolt and the doorknob lock. When I returned, only the deadbolt was locked.
When I went to bed, I turned out every light. When I woke up in the morning, the light in the art studio was on. As far as I know, the only way to get to the art studio is to go through the front door of the apartment, cross in front of the bedroom door, and go down the steps.
There was no place to put anything in the bathroom other than the floor or the toilet.