Back doors wont open from the inside?

I have a 95 caprice ex police car and the back doors wont open from the inside. I know why they wont open and its not child proof either. I just want to know how to make them unlock from the inside because im getting tired of the back seat passengers feeling like prisoners.

Take the side panel off of the door and check to see if the linkage is there - if it is, there's probably a plastic clip that needs to be installed. That was the case with my car.