Jamaican street gangs (posses) formed during the 1970's around Kingston, Jamaica. Although members of a given posse tend to originate from the same neighborhood in Jamaica, notable exceptions include the Rat Posse, all of whose members have killed Jamaican police officers; the Hotsteppers, composed only of Jamaican prison escapees who have been convicted of a capital offense; and the Shower Posse, so named from its practice of showering victims with bullets. Between 1985 and 1992, more than 4,000 U.S. homicides were attributed to Jamaican gangs.
Similar to the Bloods and the Crips, Jamaican posses are not hierarchial organizations. Leadership appears to be based on criteria such as "status and
reputation in Jamaica and access to money, weapons, and drugs." Nevertheless, many posses have successfully imported, distributed, and
directed street sales of vast quantities of drugs, with a focus on crack cocaine
having occurred by the mid-1980's. Although drug trafficking is the major
source of income, some posses are organized for other purposes, including
firearms trafficking, robbery, shoplifting, and murder for hire.
Most U.S. posse members are illegal aliens. They change their names frequently (although they retain their street names) and have easy access in Jamaica to illegal immigration documents and other forms of identification. Within this country, they are highly mobile and are found in rural as well as urban areas. From points of entry in Florida and New York City and, more recently, Houston and New Orleans, Jamaican posses have spread throughout the United States. An estimated 40 posses, with a total membership of 22,000,
now operate in 35 States. does this help u out.