Lockard's principle and forensic specialisms

We are raiding the Guardian long read archives to bring you some classic pieces from years past, with new introductions from the authors. This week, from 2022: forensic scientist Angela Gallop has helped to crack many of the UK’s most notorious murder cases. But today she fears the whole field – and justice itself – is at risk By Imogen West-Knights. Read by Lucy Scott. Help support our independent journalism at theguardian.com/longreadpod