The stories of people who have shed crocodile tears to hide their guilt in criminal cases.

Whether thrust into the limelight or fame hungry attention seekers, they all shared one thing: their public deception led to their demise. The signs were in front of us, but how do you spot a criminal?In this exclusive ID series, a crack team of three experts - body language, voice and psychology - analyse iconic TV appeals by those who claimed to be grief stricken but turned out to be the perpetrators.