Good news!
My neighbor found my neoprene Mercury binder complete with owner's manual, key code card, and registration. She was out walking the dog and saw it laying near one of our neighborhood fire hydrants. We live one street over from where the power lines run. Since there's lots of trees, we believe a bunch of degenerates hang out.
We're also very close to a new high school. Another neighbor reported the police finding backpacks with student ID cards awhile back for a different call.
We'll definitely be more watchful and ensure the cars are locked at all times.