According to the indictment, the Rollin’ 60s Crips is a national street gang founded in Los Angeles, California, in the mid-1970s. In approximately 2006, Jerome Hamilton started a Detroit set of the Rollin 60s, which now boasts approximately 150 members and who operated primarily on the west side of Detroit in the vicinity of Seven Mile and Tracey. The Rollin 60s Detroit chapter is a violent organization responsible for numerous assaults, robberies, carjackings and the unlawful possession and trafficking of firearms and narcotics in and around the Detroit metropolitan area over the last nine years.
https://www.justice.gov/usao-edmi/pr/rollin-60-crips-gang-leaders-sentenced-racketeering-charges-1

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