MA Visual Arts - Unreliable Witness

I'm thinking about how story makers weave truths and half truths together to form engaging content and I keep finding myself drawn to the notion of the 'unreliable witness'. I like the way you can convince the gullable of almost anything and how you can fool the world if your lie is big enough. The plot for '100 DATES' appears as fantasy or fable but could some of it be true?

Are there really people out there like Desta, William and Kathleen? Will you believe them when they narrate their tales, I wonder? I am trying to locate texts that are exemplars of the 'unreliable witness' rule. Any suggestions will be gratefully received.

Karl