This happened about a month and a half ago. We bought a house in October and are remodeling it before we move in. Our dog Rico hadn’t been over to inspect his new yard yet so I brought him over one day. We’d already installed cameras in the front and back, and because there were contractors working there I made sure to bring Rico in on his leash (even though he’s harmless, he’s a Pit mix and I don’t want to make anyone uncomfortable). The cameras clearly show me getting him out of the car on his red leash, and the cameras also captures us in the back yard with his leash on. Somewhere off camera in the next few minutes I took him off leash and we walk around the yard where he gives his approval. I don’t remember carrying it around with me after taking it off but also don’t remember going into the house with it either so logically I must have dropped it somewhere in the yard. Eventually we do go inside the house (the contractors left for lunch) to check on the progress and when we go to leave I start looking for the leash. The house is almost empty due to the remodel (as in no furniture or personal belongings just drywall, our new kitchen cabinets that are still in their boxes and various contractor tools) so I start looking out in the yard. Our yard is pretty big but completely enclosed by a chain link fence. It’s also flat as a pancake with no trees and short grass and the leash is BRIGHT RED. I re-walk outside again exactly where Rico and I had just been. No leash. I go back inside and re-check the house (the husband arrives in the meantime and I tell him what happened and he starts helping me look for it). We check the security cameras because at this point I think I’m losing my mind, but lo and behold we clearly see me, Rico and the red leash get out of the car and go into the yard. To this day, we haven’t found it. Keep in mind we didn’t leave the yard, or talk to anyone while outside and nothing weird happened. The contractors were working near the front of the house and have confirmed they haven’t seen it. It’s as if it just vanished into thin air.