Lost blue zip-up sweater

I lost a blue zip-up sweater in the basement of Sloan Hall (Math corner) 380-W.
I probably left it in the room Tuesday 11 12:50-2:05PM, during my midterm.
I went back to the classroom after 8:00PM but the sweater was lost.
If anybody has any idea where it might have gone, please tell me and I would be very grateful.

Thanks,
J