replace inside door handle on 1990 Chevrolet Caprice

How do I replace the inside driver's door handle on a 1988 Chevrolet Caprice? The bolt inside turns but does not loosen.

Asked by for the 1990 Chevrolet Caprice
Looks to me like the door panel has to be removed first then you can get to the mounting screws and sometimes a door panel removal tool is needed to pop the fasteners and both items are available at or at their local store