The UK’s most respected forensic scientist, over the last five decades Professor Gallop has led teams to find vital evidence in many of the UK’s most challenging cases, including the deaths of Stephen Lawrence and Rachel Nickell. The author of the bestselling When the Dogs Don’t Bark returns with How to Solve a Crime: Real Cases from the Cutting Edge of Forensics, a fascinating and authoritative account of real-life forensic science. Interviewed by Gerry Foley.