When you work the night shift for too long, the murders start to link up with one another, blending cause and effect in a centrifugal force that gnaws away at the city. The veteran reporters start to see this; the man gunned down one night is related to an ongoing gang dispute, which originates in another murder from the previous week, and so on. The crimes dot their personal maps. Driving by Mosqueta Street, David points to a specific building and recalls the night he photographed an injured man that had been hit by a car. It was only later that his editor pointed out to him that the victim was in fact José Luis Calva Zepeda, also known as the Guerrero Cannibal, one of contemporary Mexico’s most notorious serial killers, accused of eating parts of his victims, all young women. When the police located him, he jumped out of his apartment window and ran across the street, before being struck by a car and apprehended.
from Longreads Blog https://blog.longreads.com/2016/10/05/chronicling-mexico-city-nights/