Featuring exclusive interviews and shedding new light on crimes that shocked the nation, this documentary looks beyond fake tears to reveal stories of deception and betrayal, when people who have feigned innocence or made public appeals for information - often on camera - committed the crime themselves.
The programme re-examines the Philpott case, in which Mick and his wife Mairead, who took part in a press conference after their house fire killed six children, were finally convicted of their manslaughter in April 2013, along with their best friend Paul Mosley.
The film contains interviews with Paul Mosley's brother Bryan, Darshna Soni, who covered the story for Channel 4 News, Mick Philpott's former partner of several years and 'star' witness to his trial Heather Keogh.
The film explores the case of Stuart Hazell, convicted in May 2013 for the murder of 12-year-old Tia Sharp in South London in August 2012, including a powerful interview with her father Steven Carter, and with Detective Constable Alison Grubb from the Metropolitan Police, whose role was to support the family throughout the search for Tia.
Shafilea Ahmed's parents were found guilty in 2012 of her murder from 2003. The couple's own lawyer, Milton Firman, gives his first account of his relationship with them and how he was convinced by their claims of innocence.
Simon Foy, former Head of Homicide and Serious Crime at Scotland Yard, offers his own insight into crocodile tears cases, whether they are on the increase and the clues that investigators look out for while examining a case.