I keep getting water where I painted in red. There was a crack in the metal near the top below the weather stripping, which I sanded and filled with epoxy and it's not leaking from that spot. I took the weather stripping back off, unbolted the liftback strut where it connects to the body, and cleaned the whole area off and found no cracks or signs of fatigue in the metal. Took the taillight out as well to check it's seal, which was fine. Oddly, I don't see any water stains or signs water is streaming down any of the inside metal panels.
Observer in the hatch area while a helper outside gently hoses various parts of the car's exterior, starting low and working slowly upward. If it is coming from the roof seams the ceiling liner will have to come off to find the spot where it is coming in. But if it is the roof it is probably from the seam near the hatch hinge.