the fight originated during gilson ramos da silva , 21 , a . k . a . " gilson aritana , " a member of the ada ( " amigos do bairro " ) gang lured other members into the " fortaleza da mineira " ( quarry hillside ) to sell drugs , ricardo teixeira gomes , a local government official said . the division is controlled by rival gangs comando vermelho ( central authority ) , which does not recommend of other gangs selling drugs in the regional . comando vermelho subsequently started attacking the rival gangs of eta to protect their turf .
Ramos da Silva killed 11 people.