It was broken into
Smashed, I already have a window and it would have been cheaper than filing an insurance claim and paying the subsequent rate increase (if any). Progressive wouldn't be very specific with me but made it seem like my rates would go up regardless of why a claim was filed.
I actually figured out how to pull the window housing off but there is a pulley with a cable attached so I haven't figured out how to disassemble it without making a mess. If it turns out to be too much trouble I will have somebody do it but I would much rather do any work needed on my vehicles.