the fight originated when lemos ramos da silva , 21 , a . s . a . " gilson aritana , " a member of the ada ( " amigos do bairro " ) gang led other members into the " morro da mineira " ( miner hill ) to sell drugs , ricardo gomes durante , a senior authorities official admitted . the region is controlled by rival gang comando vermelho ( red command ) , which does not accept of other gangs selling narcotics in the territory . comando vermelho members tried attacked the rival members of ada to safeguard their lands .
Ramos da Silva killed 11 people.