Charles Ingram
This isn't the usual type of suggestion, but I thought you might find it as fascinating as I did :) Back in 2001, a man named Charles Ingram won a million pounds on the British version of Who Wants to be a Millionaire.You can watch the video of the whole episode on YouTube, starting with http://www.youtube.com/watch?v=cUHz2RSsS1k&feature=related. The actual episode starts at 5:00 (before that, it's documentary footage concerning the situation), and he starts answering questions at 6:40. It starts getting really interesting in the next section (http://www.youtube.com/watch?v=6q0K_I4DMX4&feature=related). The whole thing is on the long side, unfortunately. You might want to just start with the second-to-last segment (http://www.youtube.com/watch?v=HYJuxC1TDro&feature=related) and the end (http://www.youtube.com/watch?v=ZLm-oL-LuQA&feature=related), which are by far the best parts!
You've said before that people give the most clues to deception when under pressure, and this is by far the best example of that I've ever seen. The video's description tells you what's going on, but I'll leave it up to you if you read it before you watch or not :)
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shylohg commented
Ohmygosh, I watched the entire show and wow! I think I am still in shock.