Bicycle detail

I kept it inside a private 2-car garage that we share with our neighbors in a condo complex. The garage is at the end of a dead-end drive with no public foot traffic, so even when the garage is accidentally left open for several hours, there's very little risk of theft. So, I (foolishly) never locked my bike up. Yesterday, our neighbor opened the garage without knowing it. It was only open for about an hour. During that time, the garbage men backed down the drive to collect. I suspect they took it, but I have no proof. The chances that anyone else happened to walk down our drive at 9am is pretty remote.