I came across this quote today and it so encompasses what the heart of Let Them Have Faces is about:
When it is genuine, when it is born of the need to speak, no one can stop the human voice. When denied a mouth, it speaks with the hands or the eyes, or the pores, or anything at all. Because every single one of us has something to say to the others, something that deserves to be celebrated or forgiven by others.
- Eduardo Galeano (The Book of Embraces)
Everyone has a voice - but some are being denied the right to use it. You do not need to give them a voice - you need to take away what's keeping them from speaking. It doesn't do any good for you to take her story and tell it - she needs to be able to tell it because she lived it. We all have something to say - and we can all say it with our own voice.