I'll give it one more try. The man on the right holding the gun and the baton, was captured by the video after the lattice was removed and the glass was broken. His position was defensive, he was not the person with the black and white bracelet. His hairline is receeding, and his hair is a light colour.
There was an interval between his image in the chamber and the removal of the lattice and the glass. The images are from different perspectives. One is a photogrpah from inside the chamber, the other from the outside.
But both captures of the hand holding the gun are from the passage outside the chamber. They are NOT the same hand. imo.