Sinister real-life crimes from across the UK are re-explored through CCTV footage, police files and accounts from those directly involved in solving the case.
In 2013, when Detective Superintendent Martin Brunning was called to the scene of a man's body, dumped in a ditch, he was in a race against time to catch one of the UK's most notorious female serial killers, as she went on a killing spree.
S1E1 43 min