Do you know your neighbors at all? Sound like the other 'dog' owner is relatively nearby.
I'm not a parent, and I know this fear of predators thing is drilled into every parent these days, but I guess I think it's sad that another player in the game is immediately assumed to be some kind of pervert.
Since we moved into our home, 3 homes had turn overs.
Those homes are now owned by an illegal immigrant network.
The homes were redone and there is a continuous slew of people coming in and out of the basement....cots, different type of contractor vehicles showing up for the job of the day.
Since this turn over, a lot of gang type people come and go to these three homes too.
Since this turn over, my neighbor got raped. My house had an attempted break in...my dog saved us.
These really, really scary men can't keep their eyes off my daughter.
Not a great situation.