► As part of this week's Science special issue on forensics, Lizzie Wade told the story of how José Torero, a world expert in the forensic science of fire investigation, has shed a light on — or perhaps,
added to the mystery of — «a
crime that shocked the world: the disappearance of 43 students from the Ayotzinapa Normal School, a
rural teacher's college near Tixtla, Guerrero,» in Mexico in September 2014.