James Le Mesurier's body was found in the early hours of 11 November 2019, on the cobblestones of Ali Pasha Street on the West side of Istanbul, Turkey. In death, the co-founder of the White Helmets left behind a tangled knot of truth and lies. Untangling that knot would mean finding out who he really was and how he came to die. It’s a story which goes to the heart of a very modern war.