Yep, retic. Very likely escaped, that's a morph. Good capture.
Anyone move out of the area recently? It may have been left behind or turned loose, last week we ended up with a pretty little morph corn snake that had lived wild since last fall according to the prior owner's neighbors; she turned all her animals loose when she left.
It's young enough that it would have been produced in the last few months. Try posting pics on The Retic Nation on Facebook. Someone may recognize who bred it.
I will do that. What morph? I think I see motley? Platinum?