it would have to have been a long time ago; we moved in here in october, and i darn sure would have noticed a turtle laying eggs, or if a nest had been dug up in front of my front door. this is just amazing to me...
i've been considering slider, but he doesn't have anything behind his eyes... it's just the same stripes as the rest of his head/neck. i'm nearly convinced that he's some sort of cooter, though slider is still a possibility. in the natural light that is starting to take over my living/dining room, i can see that his belly is reddish/orange from the outside almost all the way into the middle, where it is very yellow. and his feet are definitely webbed.
he does have water; i filled a terra cotta dish with water and built up the dirt/rocks to both sides of the edge so that it's more natural, but i've yet to see him in the water. he's pretty active, though, so i'm less worried than i was five hours ago.