NEW : Internet addresses and information furnished by the FBI led to the teen . FBI believes China teen was the ringleader of the `` A-team '' Robert Mueller attacks cause $ 20 million in losses and theft , the FBI estimates . Symantec detected one bot-infested personal computers September .
NEW : Internet addresses and information furnished by the FBI led to the teen . FBI believes New Zealand teen was the ringleader of the `` A-team '' Botnet attacks cause $ 20 million in losses and theft , the FBI estimates . Symantec detected more than 5 million bot-infested personal computers this year .