KUMI 415 is a predominantly African-American prison gang that was originally formed in Folsom State Prison in the mid-1980s, and members were mainly from the San Francisco Bay Area.
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Overview
Along with the Crips and Bloods, 415 KUMI Nation members have recently provided recruitment pools for the Black Guerrilla Family, a gang with similarly large numbers in the Bay area and Northern California. In the Monterey County Jail, brief alliances have been reported among the Bloods, Crips, and KUMI 415 during period leading up to Stanley Williams' execution.
KUMI is the Swahili word for the number 10, and the sum of 415 is 10. 415 also refers to San Francisco's area code. They have been reported in:
Tattoos and culture
KUMI 415, also known as the Kumi African Nation, often incorporate African symbols—including pictures of the continent itself—in their tattoos. For example, a popular tattoo among members of the Kumi African Nation depicts a yero, or African Warrior, rising up out of an outline of the continent of Africa. In his left hand he holds a machine gun, and in his right he holds a flag bearing the numbers 415. These images reflect the African orientation of both the Black Guerrilla Family and the Kumi African Nation, which both encourage their members to learn Mau Mau history and words drawn from the Swahili language, which they use to communicate with each other in ways that will not be accessible to outsiders.