DocPlay Exploring murder cases where investigations stalled or went cold, often for decades. 2026-06-02 Exploring murder cases where investigations stalled or went cold, often for decades. 2026-06-02 Exploring murder cases where investigations stalled or went cold, often for decades. 2026-06-02 The French Riviera in the seventies. Agnes Le Roux, a young rebellious heiress, goes against her family's interests allowing a mafia clan to take over their casino palace. And then, she mysteriously disappears. 2026-06-02 Belgian-Moroccan jihadist Abdelhamid Abaaoud is tracked by intelligence, but his group strikes Paris before he can be caught. 2026-06-02 Seventy-year-old Thomas Briggs is murdered on the 9.45pm train from Fenchurch Street to Hackney Wick on 9 July 1864 by Franz Muller. 2026-06-02 The murder of coin dealer 64-year-old Isaac Frederick Gold on the 2.00pm express train travelling from London Bridge to Brighton on 27 June 1881 by 22-year-old Percy LeFroy Mapleton. 2026-06-03