Very sorry to hear of your loss. Your post brings to mind a moment of carelessness on my part recently. I will share it because it is something some may profit from reading.
A few weeks ago I left me home for a short trip. I had started my SUV and it occurred to me I needed to check something in my garden shed. I was planning to stop at a store on my business trip during the day. So I get of my SUV with the engine running, after all it was cold and it needed to warm up. Then I go to the shed and have a bit of difficulty with the padlock on the door using the key on my key chain. It opens, check to be sure of what I needed to buy and off I go for the day. I cross the toll bridge, travel into Indiana and realize after about 45 minutes of driving I was ahead of schedule for my first business appointment. Drop into a store and bought a couple of items. When I return to my SUV I get in my SUV and it won't start. My first thought was I lost my keys and smart key. Then I find my keys are in my pocket, but not my smart key, well not all of it, just the physical key for my glove box and door, but it can not be used to start the vehicle. This key inserts into my smart key and has an open end where you can attach other keys or a ring for keys. That was in my pocket, but not my smart key. Without going through all my frustration, trip back into the store, retracing all my steps, leaving my phone number at the desk, etc., I read through my owners manual to find I would have to have my vehicle towed to a dealer to get a replacement smart key which is not cheap, plus the tow. You have to show up with your vehicle and not just the number which I did have written down at home. Probably a safe guard requirement so someone can not get a copy without proof of vehicle ownership. I called my wife and realized I would be better off asking her to come to where I was and deal with the situation than call a tow truck at that point. I am really frustrated at this point. To calm myself I decided to mentally retrace everything I did again (2nd or 3rd time) when I left my home. On this retracing of my morning it dawned on me I had started my SUV, left it running, when I went to my garden shed. Then I had taken my keys with the smart key attached out to unlock the door. I immediately called my wife again. Thankfully, she needed to take care of a couple of things before she could just get in the car and travel about an hour with bridge toll to my location. I asked her to go out to the shed and look in the shed and on the ground for my smart key. It had come partially lose a couple of times in my pocket, but never had it separated from the metal key previously. She found it on the ground under the padlock! It still meant she had to drive out to my location since I needed the smart key to even start my SUV. I had already canceled a couple of my appointments, so I cleared the rest of my day and bought my wonderful wife lunch at one of her favorite places and we did a bit of shopping for her!
When I got home I took a piece of strong clear grizzly tape I had and carefully taped the physical key with the ring portion to my smart key. The smart key has a very small button that when pushed releases the physical key and the key ring I have on it. I only have a couple of keys on this ring, but I believe it was enough weight or resistance coming out of my pocket it simply detached and it fell to the ground. If I had not left my SUV running I would have realized this when I tried to start it in the driveway. This experience also made me realize I could actually do the same thing any time I pulled my keys out of my pocket. In a store, on a trip hours away from home, airport parking lot, etc. I encourage you if this is the set up of your smart key, physical key for you door and glove box, where you can attach a key ring, but will separate from you smart key -TAPE IT IN PLACE! I was fortunate I was only an hour from home, that I had someone to call and was able to piece together on the occasion, not a couple of days later my mistake and lack of attention in opening a padlock.