Amazon. It was a fulfilled by Amazon order. So it came from one of there warehouse spaces. Traveled with the shipper for 2 days sat on my porch in daylight for a few hours before I got home at a little after 6pm.
>Disgruntled warehouse worker? I doubt it.
>Someone in my neighborhood? Taken and returned in the middle of the day without anyone noticing? What are the chances I live near a regretful master ninja thief.

(I quickly just checked over my shoulder)
>It was returned in questionable condition and they didn't bother inspecting it. I always keep in mind the phrase "don't attribute to malice what can be easily explained by stupidity" when looking for root cause. Being lazy and stupid is just so easy. I think I'll include the SN of the one I returned in my review. Just in case someone else gets it as "new".