#1 Calle 18
Calle 18 has the heaviest prevalence in Southern California and a membership of 75,00, and have been recognized in 120 US cities in over 37 states. They use the colors blue and black and tend to wear clothing representing the Dallas Cowboys, Losangeles Lakers and Oakland Raiders. They have a rap-sheet of an estimated 250 homicides, various counts of arson, illegal immigration, extortion, human trafficking, kidnapping, prostitution, weapons trafficking and copyright infringement.
#2 Mara Salvatrucha
Mara Salvatrucha is a giant, multi-faceted gang with a membership over 70,000 in nearly every US state. They are responsible for numerous crimes including drug trafficking, human trafficking, murder, extortion, arson, kidnapping, battery, illegal immigration and prostitution. They are connected to the Sinaloa Cartel and Los Zetas Cartel. The FBI has dedicated a task-force to the gang and has teamed up with countries like E Salvador and Honduras in an effort to combat the giant gang. They can be identified with by full body tattoos that bear Satanic symbolism or other forms of evil. They are also known as MS-13.
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Complete list here.
