the fight occurred when vliet ramos du silva , 21 , a . k . a . " lemos aritana , " a member of the ada ( " amigos do bairro " ) gang brought other members into the " fortaleza da mineira " ( miner hill ) to sell drugs , ricardo teixeira dias , a local authorities official said . the region is dominated by rival gang comando vermelho ( red bull ) , which does not approve of other gang sell drugs in the northeast . comando vermelho also started using the rival members of ada to protect their lives .
Ramos da Silva killed 11 people.