Structure of Medellin Gangs Netwrok*

For more than two decades, 1980 to 2000, Medellin has been considered one of the most dangerous cities around the world. In a joint effort with the National Center for Historical Memory, the structure of the network of gangs of Medellin is constructed out of the testimony of former paramilitary groups. The multilayer network comprises confrontation, collaboration, relation with legal actors and sponsorship networks for six analysis periods. It is shown that the parameters of the confrontation network correlates with the evolution of crime indexes of the city for the same periods.