“Drill rap, a style of music that originated on Chicago’s South Side, depicts and glorifies gang lifestyle and has also been cited as a cause of violence in the city,” according to Andrew Henning, Vice-President and General Counsel of the Chicago Crime Commission. “A faction is a subsection of a larger gang operating autonomously or in conjunction with the main gang and sometimes comprised of members from several different and/or rival gangs,” he added. Davis, Chairman and President of the Chicago Crime Commission. “This change can be attributed to the arrest of gang leaders, dismantling of public housing and gentrification, and deconstruction of Chicago neighborhoods,” said J.R. The report suggests that a significant and noticeable change in the traditional gang hierarchy is the shift from a strong centralized structure into an assortment of cliques or sects known as factions. The guide profiles the most prominent gangs and their leaders, the roles of girls in gangs, suburban gang activity, the roles that social media and drill rap play in fanning the flames of gang violence, and the intersection of gangs, cartels and drugs, and drug trafficking. The Gang Book estimates that there are over 50 active gangs operating in the Chicago area with a population that could exceed 100,000 members. The Chicago Crime Commission released the latest edition of The Gang Book, a comprehensive compilation of data and information about street gangs in the Chicagoland area.