@dederickve, My husband has moderate Alzheimer's, diagnosed in 2019, but I noticed his behavior was off a couple of years earlier.
I am able to leave him for a few hours at a time. I don't go far, and I limit my necessary excursions to a few a week.
I've installed cameras in our home so I can keep an eye on him where there's a good WIFI connection when I'm out.
Recently, he walked to the park near our house in his pajamas when I was grocery shopping.
Trial and error - I found a tracking device that uses GPS. It's small and lightweight so I can always check where he is. He keeps it in his pants or shirt pocket.
He was resistant to being tracked. I asked him to wear the tracker for me because if I fall or get sick I need to know where he is so I can find him and he can help me. That worked and he's been wearing it.
The device cost under $20, and one month of service was $20, no contract. Service packages are available for a discounted rate, but not refundable. I wanted to try it for a month before I committed to longer service.
He was in Adult Care for six weeks, but got discharged because he wasn't manageable. I was looking forward to the peacefulness of having him out of the house a few days a week, but it wasn't doable. At least now, I have some peace of mind for when I leave him. He's happiest at home and doesn't like other people in the house very much.