Kerry Daynes

The story behind the murder of 16-year-old Becky Watts, who was killed by her stepbrother Nathan Matthews and his 21-year-old partner Shauna Hoare in Bristol in February 2015. This programme documents the huge police manhunt that unfolded in the wake of her disappearance, and the police investigation which eventually brought her murderous stepbrother to justice.

Before his death in 2009, Michael Jackson was the biggest pop star on the planet. But his private life was marred by allegations of child sex abuse. Experts in body language, speech and forensic psychology explore whether he was "faking it" on camera.

Idol on stage. Monster off-stage. R&B superstar R. Kelly was a serial sex offender who secretly targeted underage victims for more than two decades. Experts pinpoint the tell-tale signs of a predator.

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.

Experts examine some of the Victorian era's most extraordinary and gruesome killings, exploring their similarities with those in today's news headlines.