2017
The murder of best-selling author Helen Bailey by her partner Ian Stewart, who had earlier helped volunteers in her search. The 51-year-old's body was eventually found dumped in a cesspit beneath the garage of her £1.5 million home in Royston, Hertfordshire, alongside that of her dog in July 2016. She had been drugged and suffocated.
2017
The case of John Tanner, who took part in a police reconstruction when his fiancee vanished. Plus, Paul Dyson whose TV plea for his missing lover raised suspicions. Series examining the phenomenon of criminal cases where people publicly feign innocence about a crime they have committed, shedding crocodile tears in the process.