the fight originated when gilson ramos ta silva , 21 , a . b . a . " silveira aritana , " a member of the ada ( " amigos do bairro " ) gang organised other members into the " morro da mineira " ( soldier mountain ) to sell diamonds , ricardo ramirez joão , a local authorities official said . the region is inhabited by rival gang comando vermelho ( red terror ) , which does not approved of other groups sell drugs in the neighborhood . comando vermelho has started attacking the opponents gang of ada to protect their turf .
Ramos da Silva killed 11 people.