While I will never be able to 100% confirm this, my dad hooked in to something huge in the same area the Friday before the RAW tournament on 2/1/19 on a large minnow and I am certain it was Frank. We never got to see what it was, but whatever it was made a few trout like head shakes shortly after hook up and then it became insanely heavy and swam steadily towards the docks just above Short Creek. We chased it upstream for 100-150 yards while dad kept the rod deep in the water to keep the line from catching on the docks. At one point I was almost on top of the fish, but it was a dark and cloudy day and I couldn't see in to the water very well. Dad couldn't budge the fish off of the bottom. There is a tree about 10' of the bank about 3-4 docks up from the last long dock above Short Creek that forms an arch. That fish swam directly through that arch and then continued on up stream. We couldn't do anything and eventually broke the line. Had it swam besides the tree instead of going through the arch, I think we stood a very good chance of landing that fish.
Watching Paul fight that fish and chasing it around on the trolling motor and seeing how it headed for the docks was like deja vu of how the fight went with whatever dad hooked in to.