He told me where he lived and how the cat is fed and has free range. He also explained that the cat had a history of getting out of tags. He assured me that the cat had had all of its shots.
Then yesterday afternoon the doorbell rang. Antonio was looking for the cat up and down the street. I introduced myself as the person who spoke to him on the phone. After seeing the cat was tagged, I've been getting in the process of ushering it out at night so it's not sleeping in the house.
I did a scan in the house and couldn't find it. Then I went to the cat nest that I know it's made. The back porch has some utility shelves that we store our camping supplies on. The cat loves to hide in the rolls of the sleeping bags. I extracted the cat and brought it out to Antonio. Antonio had brought the vaccination paperwork and the clipping from the newspaper. He was concerned because the cat stopped showing up when he would bring his daughter home from school. It would jump up on the car when they parked.
So, it seems that he is a responsible cat owner. So, it looks like jnanacandra and I will be taking a trip to the shelters to find one that can live with us without us wondering when someone will come looking.
Edit Clarified a typo thanks to the watchful cat-like eye of jnanacandra