Probably vandals tossing something from another car or the roadside somewhere. It’s not that rare.
The last time I was in Westminister, CO I got a call from a hotel desk clerk at 6 in the morning advising me that someone had broken a window out of my Subaru. The thieves had helped themselves to a few electronic items and a tool kit.
They had also broken into a van parked next to me and stolen a fortune in electronics. The van driver was a sales rep for high end electronic test equipment in the medical field.
All done right under the lights, within a 100 feet of the office, and right next to a busy 4-lane.
We both filed an obligatory PD report that would go nowhere. The cops said this was common and we were unlikely to ever see our stuff again. Still waitin’ for a followup…