I am looking for the name of an old movie. I am not sure if it was black and white... although, I believe that it was. There is a scene (I think it is the end) where the main character (male) is holding the "creature" baby. He is standing in the opening of a tunnel - like an old sewer tunnel, maybe. He is surrounded by police and maybe scientists... they want the baby to kill it. He is insisting that it is just an innocent baby - the audience can hear the "baby" crying... It is driving me CRAZY!! I can picture the scene, vividly, but cannot place the movie.

Thanks for any help you can offer!!