Alligator Snapping Turtle

This is a small Alligator Snapping Turtle that was in my Koi Pond.  I noticed that my fish started to disappear.  One night I went out with a flash light thinking I had a water snake or some other animal catching them.  Found this Alligator Snapping Turtle in the pond.  Not sure how he got there as the nearest water source is probably 1/2 a mile and my yard is completely fenced in.  Either way, it was released in another local water hole.