I had a redhorse on at that same spot. I don’t know how he got off. Unfortunately I was using my cat pole, so I had no idea the guy was hooked (or not) in the first place. I started reeling and there he was, and then I dragged him while I walked the wall and he got off.
I might have to head up to the CR Dam (area) this weekend and fish for red horse. They should be there now.