My local distribution center reviewed the GPS tracker on the truck which showed him outside my house when the delivery scan was made. Also the address they had on record was correct. I'm pretty sure it was stolen by a passerby.
I get more than enough packages that my carrier has joked about it with my family members that answer the door when he arrives. I just thought it was suspicious he didn't remember this one since it would have been at least the size of a head, plus some.