Popping in to say my brother discovered these just a few minutes ago in our driveway and the yards/driveways of our whole street. We live on the west side too. ETA: we found a total of nine. Our neighbor's kids said a white truck was doing the deed, but they didn't see the driver or the plate. ETA2: up to 11 now, my brother did a walk of the whole neighborhood past our street and found a couple more. Gross.