My co-worker thinks we stole her stuff from her office

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This happened just recently. I work as a teacher in a certain school. The schedules involved students and teachers transferring to rooms for different subjects. So there, there were a couple of us teachers who borrowed this one teacher's room for about 50 minutes. I saw this teacher complaining about who stole her marker and her precious post its. Of course, I had no idea. Her stuff were gone even before I got to occupy her room. Now, this annoying co-worker is suspecting everyone who have used her room and gives them(including me) each a death glare. It feels terrible to have someone steal from you but does she really have to give us this glaring look even when it's just suspicion? What do you think of this co-worker of mine? I seriously would talk to her straight out. If she wants a confrontation, then fine by me! I don't like this silent glaring behind my back method. I would insist she open my bag, search my room, search me all over, just to clear me out from her suspicions. I hate being treated so sourly for having done nothing wrong. I wouldn't hate her so much if she really confronted calmly. Now, if she's the same next week, I'd give her a piece of my mind!!!