the fight originated when gilson ramos la silva , 21 , a . s . a . " gilson aritana , " a friend of the ada ( " amigos do bairro " ) gang led other members into the " morro sa mineira " ( soldier hill ) to sell drugs , antonio teixeira dias , a local police representative said . the region is run by rival gang comando vermelho ( red brigade ) , which does not approve of other gangs selling drugs in the region . comando vermelho eventually begun fighting the main members of ada to protect their turf .
Ramos da Silva killed 11 people.