2023 marks the 40th anniversary of the disappearance of Santiago Corella, alias ‘El Nani’, a petty criminal from the Spanish slums of the early 1980s. On 13 November 1983, he was arrested for the robbery of a jewellery shop and the murder of its owner, and taken to police headquarters. He was never seen again. The investigation into his disappearance, still unsolved, revealed the existence of a corruption scheme within the Spanish police. And it gave rise, in 1988, to the first trial fully recorded by television cameras where, for the first time in the history of the young Spanish democracy, part of the police elite of those years sat in the dock. A trial where the cameras of public broadcaster Televisión Española were able to film without restrictions.