That's an amelanistic(albino) Black Ratsnake.
It's impossible to say if it is actually a wild specimen, or someone's escapee pet, as there are a large number of these albino's bred in the hobby, and that area is also a part of their huge natural range.
That is a really nice looking amelanistic specimen either way, congrats! 
~Doug
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"a snake in the grass is a GOOD thing" 
my website -serpentinespecialties.webs.com


