Melanistic Yellow-bellied Slider

You should be in range for yellow-bellied sliders (just a different subspecies), but I'm not sure if they usually turn melanistic when they are older like the red-eared do. Red-eared sliders are introduced all over the place so it could easily be that too. Just hard to tell since there aren't any facial markings to go off of! Just what general shape makes me think

Looks like an old, melanistic slider but I can't be sure with how pixelated the photos are

I think it's a snapping turtle