It was a gift that would change Alfonso Margarito Martínez Esquivel’s life and illuminate some of the darkest moments of Mexico’s recent history: a secondhand Canon SLR bought from a photographer called Goofy.
Through its lens the Mexican photojournalist would witness his country’s slide into drug-fuelled carnage – bodies strung from bridges, dumped on sidewalks, dismembered, burned – without ever losing his trademark grin.
